how do i hook up the PSP to PS3? What can it do.

blaaahhhh.

There's an entire section in the manual right here about Remote Play:

http://manuals.playstation.net/document/en/ps3/current/network/index.html

Im trying to go o nthe intrnet with my PSP. It says i need to switch the WLAN on. How do i do that?

Then you would need to call your Internet Service Provider and they will guide you to obtain the key.

How do i check my WEP key? I went to the router website but i dont know my user or pass.....Haseokicksass