Ok, on a side note, not sure if you have already or not, but I BELIEVE you have to get permission from Jelsoft/vBulletin to have the domain name
vbdownloads.org. Once again, not sure if you have already asked them or not, but it would be a good measure on your part if you do/did. Chances are, they will say go ahead but have something saying your site is not affiliated with Jelsoft.
I'll take a look at your site a little later tonight though. But from the sounds of it, it may be a site I'll be a part of