new EVO(dec.2010) cant flash roms or nand restore help!

[clever1]

i've had 2 android phones before, i must've flashed roms 50+ times in the past nevertheless im paranoid enough to always follow procedure by confirming on written step by step instructions. just now with this new evo i bought a couple weeks ago im having problems flashing roms, im positive to be unrevokedly rooted forever with full nand acces. tried cm6.1 got message "cant symlink" "error line 31" process aborted. retried unsuccesfully, redownloaded rom, retried failed again, tried other roms like virus and bakedsnack every attempt unsuccesful with SAME error. of course i performed a nandroid backup which i've been trying to restore since the first failed attempt but though it completes seemingly without problem phone gets stuck on "htc evo 4g" screen. i use amon ra recovery 1.8.0, have hboot 2.0.2 S-off. always careful to have enough juice. help me, pretty please.