ppc6700 major problem.

[eh-ef-kay]

i appar to be having quite an issue i've been helped at howard forums a lot but everyone pointed me here
i have an Alltel ppc 6700/apache flashed to cricket. well was. anywho when i atempted earlyer to install a rom i found here kitchen it errored and sent my phone to the boot menu. "serial" "usb" 1.00 ect.. anywho i've tried hard resetting. soft. trying to flash it back with the original rom. all i get it. error 150. this rom was not designed for your device i am using windows vista. and aparrently i have no way to fix this phone and worse off is i work for thr gov and its a WORK related phone. IS there anyway to fix this phone its really got me nerved. i've spent 3 days browsing forums trying programs like mitty ect. with No luck any idea? need a "cricket" rom.