i got fu**ed up...

i got upgraded my psp to 2.60(cuz i didnt know) but now it is not posible to downgrade i guess?and i couldnt play any games....?

You are correct. You are totally screwed. You can not play a bit of homebrew on that machine now. Your best bet is to sell it on Ebay and buy another one. Sorry. :o

Is it any games i can play with it now? and i can't watch movies too?

No games from memory stick. Movies yes....as long as they are in the correct format.