Doing someone a favour and need some help.

view story

http://forum.xda-developers.com – Hi guys, looking for some pointers. A family member tried updating a Galaxy S via Kies and to cut a long story short it all went a bit Pete Tong. The phone will go into download mode and is recognised by Odin but after that i get a bit foggy. I know i need a ROM but not sure which (all i have is its a UK phone and i think it was unlocked). So as far as i get it i boot into download mode connect to Odin and flash the Rom, but how?. Are there any settings i need to look out for and how many files/items should come with this ROM. Sorry if i am a bit vague, its been a while since i did any of thi (HowTos)