[Q] RSD won't flash system

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http://forum.xda-developers.com – Okay so I just picked this phone up... totally reminding me why i dumped my last motorola. anyways, i rooted it, sim unlocked it, unlocked the bootloader, flashed CWM and then flashed a 4.2.2 rom. wow, slow, buggy, lets go back to stock. loaded the 4.1.1 RSD file, edited the XML, then flashed... gets to flashing system then fails. WHY!? any ideas? i also tried flashing a modified stock rom in CWM, wouldn't boot. read something about needing stock kernel to go back to stock based roms but cant seem to FIND the stock kernel anywhere...? am i just not searching correctly? (not that scrol (HowTos)