just wanted to share my experience :P
basically instead of the flashing the kernel image to the kernel, i flashed vanilla image to the kernel
and guess what happened. lost everything in MyDocs . the phone was able to boot up, no images. just boxes (square) on desktop and boxes in menu. no writing what so ever. i managed to connect the n900 to the pc and went into the nokia drive in My Computer. and it was empty
so lesson which was learnt was that. you wont brick your phone if you flash the wrong file ... and type carefully. dont rush
now its all fine. flashed the correct files and it up and running. although ive to reinstall everything

anyone else done anything similar??