iskylove

it doesn't work

first forgive my English. im a noob to this forum and i did mod to my f90bt, and it crashed, so i deleted every files in the flash driver. i reinstalled firmware2.0 downloaded from pionner.com. ican't get it go pass boot screen and at the boot screen i press menu, i could get into the menu but if i get into anywhere else, it will pop a screen called caution. when i press ok, i can't get anywhere. do i have dl the maps and other files too?? can u tell any i can get it fix, or i have to sent it back? anyone now how to fix this problem???