i can see he is a noob, but havent we all been one once?
about the custom rom. to get the rom, you need to get it rooted. get either chainfire, or voodoo. when you are downloading it, check from your phone information, wich version of samsung rom you are in. it can be found at phone information->baseband or build version its in this format: something.jvt or .jvp or something similar. match that with the correct kernel (either voodoo or chainfire). get odin and flash it with the kernel in pda.
these are the best (in my oppinion) ics roms.
but muiu, cm9 and slim are the best for noobs. and when you are asking for the link, SEARCH THE DEVEPLOMENT AREA!!
Sent from my GT-I9000 using Tapatalk 2