A question though is there any other way to root the eris so that I could flash it to another carrier without using unrEVOked?
I am going to search and see, but if you have another idea let me know! Later.
I've never used any carrier other than Verizon with my Eris, but I have a few leads and hunches:
Leads:
(1) For methods involving Cricket, search either these (Eris) boards on AF for posts by user "pkopalek" with the keyword "Cricket".
(2) Do the same search on HTC Droid Eris - xda-developers
Hunches & WAGs
I saw a report on the XDA Eris Forums where a user mentioned that "flashing the FlashBack2.1 ROM converted my carrier-flashed phone back to Verizon". The implication was that the user had been ROM-hopping successfully with an Eris on some other carrier than Verizon... and one of the two things that are different about the "flashback" ROMs are that the "misc" partition is over-written with Jcase's "flash any RUU" misc partition image.
While I have muddled through some of those (Cricket) posts as a matter of academic curiosity, when folks refer to their phone as having been "carrier flashed", it is still a mystery to me what exact procedure they are talking about when they say "carrier flashed". Having said that, I do know that the carrier "CID" value (Carrier ID) is stored in the misc partition, and the bootloader passes the CID to the Android kernel during booting.
Speculating wildly, I'd be willing to bet that the bootloader reads the CID out of the misc partition (as it is already looking in there for custom booting instructions), and reports that CID value to the Android kernel. Since that partition doesn't get touched during normal ROM flashing, that could account for behaviors which are customized, but not altered by ROM flashing.
Of course, that's not all there is to it (I seem to remember instructions for Proxy and APN setup stuff done in the "ROM" after installation for Cricket in particular); however, it is worthwhile to note that in 99.9% of all ROM flashing operations, the "misc" partition (and hence it's CID value) are never touched.
That might mean that you can use a QPST method with an Eris 2.1/Eclair ROM, and then afterward flash any ROM you want (plus setups like APNs, Proxies, etc). But, since I have no experience with this, it's just a hunch.
If you do carrier-flash the phone with QPST, I would be interested in seeing if the CID value gets modified in the misc partition - it is easy to dump a copy of your misc partition with a fastboot oem command now that you have the S-OFF bootloader on the phone.
But, to put all this in perspective, I will offer the following advice: I have been using GB ROMs (GSB in particular) for quite some time... and while I am unlikely to give up GB anytime because of improved features relative to Froyo/Eclair, I would say that I pay a penalty for that: they are a little bit sluggish on the Eris compared to a stripped-down, bloatware-removed, Eclair custom ROM such as xtrSENSE5.01.
Everything just friggin' works on that ROM, and is about as snappy as an Eris can get (with a moderate amount of OC'ing). If it is a phone you are going to hand off to a friend - you probably don't want them griping "waaaah, this bug, that bug!", or "OMG, my phone is lag-tastic".
Maybe a rooted Eclair (2.1) ROM is the right answer in this specific case.
cheers
eu1

),its not a good idea for me to try and type and drive at the same time.
i feel you... it drives me nuts to do ANY kind of shopping with my GF... she has the attention span of a 3 year old and is constantly diverting attention away from the agenda 
). the prollem with anything other than the "root for dummies" or jcases once click app,are that they either 1)leave no recovery,and the unknowing user installs clockwork, or 2)the leave clockwork recovery. they also do not give any insite or information on how to flash,backup,etc.
I still can't believe that I was unable to see the difference between "fastboot flash" and "fastboot boot" but you guys helped a lot and thank you again.
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or is my phone about to start bootlooping and die 