You may want to list what type of modifications and whether it's for vBulletin 3.8x or 4.0x The more info you place in the request, the better response you will receive.
I apologize...I only had two hours of sleep yesterday. I just need some basic help reinstalling a few mods on vBulletin 4.0 (autothread tagger, etc.) and installing CometChat again, etc.
Yeah, I'll do that cometchat work for you. Possibly the mods as well. Open a support ticket at MordyT.com (Login) and let me know full details, I will give you a competitive price...