the next thing we can try is to get the s-off bootloader onto the phone. in a nutshell,the installer creates a temporary spot for the rom its going to flash. you need to find this spot,delete "rom.zip" and replace it on your pc with the root rom,wich you will rename "rom.zip".
this is copied from another thread on how to do it:
first,are you 100% sure youre using the rootrom? i dont see anything about hboot in your info,so it makes me wonder exactly what RUU youre using. the download youre using should have an md5 sum of: 63eacc5ede3b179f95dc22d8ef585f94 do you have a way to check it on your PC?
i actually got this to work(tho in my case it successfully flashed the entire root rom since im not bricked). im on windows 7,so if youre on something else it may be a lil different.
1)verify youre using the correct root rom.
2)run installer
3) you will get to a screen that says the following:
you are now ready to update your rom. the update will take approximately 10 minutes to finish
during the process the following things will occur:
-the android phone will be prepaired for the update process
-the process will be displayed on your pc and android phone
-the update completed screen will be displayed on your pc
4)this is where you need to stop. dont click next till youve found and replaced the file.
5)you need to make sure your hidden files are visible.
6)search your c drive for "rom.zip" or maybe just for "rom" since .zip is a file extension,not part of the name. when you find it,right click,then show in folder,or simply navigate to it in a windows explorer window. delete "rom.zip". drag the root rom to this exact location. rename it "rom.zip"(again,on windows,you prolly just want to name it "rom" as windows will automagically add the ".zip" and i dont believe you want the file to be named "rom.zip.zip )
* heres a lil tidbit- its in a different place every time you run it. so if you find it once and want to run it again,youll need to find rom.zip and swap it out each time you run the ruu.
7)once youve replaced rom.zip with the correct root rom,go to the installer and click next.
8) cross fingers
since your not getting a "bootloader fail/pass" or "hboot fail/pass" on the display,i think youre just flashing a RUU without a bootloader upate.... so i think there is hope for you
luckily,the ruu is trying to flash. if you were unfortunate enuff to be on the v3 leak rom,the ruu will not run,and no s-off bootloader. again,this indicates there is hope.
start reading on this thread,on post #140
http://androidforums.com/eris-all-things-root/350856-htc-eris-ruu-wont-run-3.html
i think it will fail with the same error,i dont want to get your hopes up. but its worth a shot

if it does work theres a few different options from there.
