zloetakoe,
Okay, since your phone has the 1.49.0000 S-ON bootloader, you don't have any many options for fixing it. But the good news is that your phone still (pretty-much) works (i.e., Android works), but custom recovery clearly seems borked.
So, the keep seems to be trying to get the S-OFF HBOOT installed. You can't directly load the base root ROM's PB00IMG.zip because of the "main version is older issues" you'd get.
So, we can try SoSicWiTiT's RUU/rom.zip rooting trick to try to get the RUU to flash the S-OFF bootloader for you.
I must warn you that the stuff below may not necessarily work

...we tried this on another phone in your similar situation without success (
http://androidforums.com/eris-all-things-root/371983-help-save-brick.html). We'll know pretty quickly, though, since you'll either gain S-OFF via the RUU / rom.zip swap or you won't.
By the way, there's a TON of good information and detail in that above "help save a brick" thread that might be useful to you or at least provide more explaination for some of the tasks below).
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Resources / downloads you'll need:
1. First, grab the
base root ROM from here:
Multiupload.com - upload your files to multiple file hosting sites!
referenced in this page:
[HTC ROMs] Consolidated HTC Eris RUU/OTA/ROM URLs - xda-developers
[ 2.19.605.1 ] a.k.a. "Root ROM" - (Eclair/2.1)
RUU: n/a
PB00IMG.ZIP: Eris_RootROM_v2.19.605.1_PB00IMG.zip
107,427,740 bytes; MD5 signature: 63eacc5ede3b179f95dc22d8ef585f94
MultiUpload.com - Eris_RootROM_v2.19.605.1_PB00IMG.zip
OTA: n/a
[COLOR="Red"]Be sure to verify the file's size and MD5 checksum (don't want any "variables" here

).[/COLOR]
2. Next, grab the MR3 "Official" RUU (ROM update utility) from the above same page:
Multiupload.com - upload your files to multiple file hosting sites!
[ 2.36.605.1 ] a.k.a. "Leak-V3" (or MR3/"Official" RUU) - (Eclair/2.1)
RUU: RUU_Desire_C_Verizon_WWE_2.36.605.1_release_signed _with_driver.exe
130,323,038 bytes; MD5 signature: 74035b1685b279b1aa4f17fafdbec78b
MultiUpload.com - RUU_Desire_C_Verizon_WWE_2.36.605.1_release_signed _with_driver.exe
You don't need the PB00IMG.zip that's associated with that RUU--we'll be using the base root ROM's PB00IMG.zip instead (that you grabbed above).
3. Third, grab the
ErisMTDNuke_v0.9.zip file from this post:
xda-developers - View Single Post - [SOLVED] Anyway to Unbricked a Droid Eris?
http://forum.xda-developers.com/attachment.php?attachmentid=527459&d=1298672645
[COLOR="red"]Be sure to verify the MD5 and size of the file after downloading[/COLOR]:
MD5: d671b18143910f297c8ebe8454b59fd7
File Size: 4,250,141 bytes
4. Lastly, let's grab my
trackball-optional version of Amon_RA's custom recovery:
http://androidforums.com/eris-all-t...2-custom-recovery-trackball-not-required.html
https://sites.google.com/site/scary...ecovery-RA-eris-v1.6.2-trackball-optional.img
File size: 3,926,016 bytes
MD5 checksum: 3217768b831a3841180699942204762d
You'll want to place this file in the c:\android-sdk-windows\platform-tools directory (or where ever adb.exe and fastboot.exe is).
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The process:
1. [COLOR="Blue"]
Make sure you've got a full charge on your phone[/COLOR]
2. Get all files and resources downloaded (above) and ready
3. Re-verify that you cannot boot into custom recovery:
-- press, simultaneously, both the call/send and end/pwr hard keys on the front bottom of the phone
-- this should take you to the FASTBOOT menu (or FASTBOOT USB if you have your USB cable plugged-in)
-- press the volume-DOWN key rocker to go into HBoot Mode
-- press the volume-UP key rocker to go into recovery (hopefully custom)
-- one of three things will happen here:
a. you'll see the stock recovery (triangle, etc.)
b. you'll the Amon_RA's custom recovery (pretty sure you won't at this point

)
c. you'll get the three skating Androids that you've previously reported
4. Okay, if you are seeing 3.c (three skating Androids) instead of custom recovery, let's do the RUU rom.zip replacement trick. Go ahead and do a battery-pull to get your phone back. Let it charge while we start the RUU (we'll soon be putting it into FASTBOOT USB mode as described above).
5. From your Windows PC, go-ahead and run the RUU (ROM update utility) and make sure you have the base root ROM's PB00IMG.zip file handy and ready to go. Don't proceed past the main / first page.
6. Now, for the part that should be simple but is tricky for some (stupid MS/Windows, LOL), is to find the "rom.zip" file on your PC. Reference these posts:
xda-developers - View Single Post - [SOLVED] Anyway to Unbricked a Droid Eris?
http://androidforums.com/eris-all-things-root/371983-help-save-brick-2.html#post2931013
http://androidforums.com/eris-all-things-root/371983-help-save-brick-2.html#post2931864
Like I indicated in my post, I'm running Windows 7 Home Premium and I found the rom.zip file in C:\Users\scaryalien\AppData\Local\Temp\{bunch-of-hex-chars}\{bunch-of-hex-chars} with a simple Windows Explorer search of the C:\Users\scaryalien\AppData\Local\Temp folder structure.
Go ahead and rename or delete the original rom.zip (or ROM.zip) and replace it with the base root ROM's PB00IMG.zip file (i.e., put it in the same place where the rom.zip file was and name it rom.zip).
7. Boot your phone into FASTBOOT USB mode (i.e., have it connected between your phone and the PC) and then start running the RUU to see if it will get the base root ROM (disguised as the rom.zip

) installed on your phone so you can get the S-OFF HBOOT.
8. Note: the RUU might very well fail (with an RUU Error 110), but if / when that happens, re-check your HBOOT version--hopefully, you'll be 1.49.2000 and S-OFF.
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I'm going to pause here at this point since going any further is entirely contingent and reliant on you being able to get the S-OFF HBOOT.
If you do have an S-OFF HBOOT, you'll next need to bust-out your Android SDK skillz and prepare to run some fastboot commands
Future steps
------------
1. You might be able to flash custom recovery this way:
Code:
c:\android-sdk-windows\platform-tools> [B]fastboot flash recovery recovery-RA-eris-v1.6.2-trackball-optional.img and then reboot your phone into your shiny-new custom recovery[/B]
-- or --
you might need to soft-boot custom recovery (i.e., in-memory) like this:
Code:
c:\android-sdk-windows\platform-tools> [B]fastboot boot recovery-RA-eris-v1.6.2-trackball-optional.img[/B]
which you can only do when you have the S-OFF HBOOT.
2. If you do see custom recovery, transfer the ErisMTDNuke_v0.9.zip file to the phone's SD card and try to flash it in recovery. This will "reset" all of the memory blocks marked as bad on your phone's internal memory partitions.
If this is successful, you should be able to wipe (as normal) and re-flash your favorite ROM.
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Sorry for the massive post

.
I'm going to go-ahead and post this and go-back and clean-up the links and formatting.
Any success you might have for the above should really go to bftb0 / erisuser1 and SoSicWiTiT for working throuh this in the first place.
Cheers and let me know if you have any questions before you begin.