I would visitors to Register on a Vbulletin Website and automatically register on my netvolution website. So , if they register in vbulletin , they are automatically registed on the other netvolution website and vice versa ( asp based).
There will be also a bridge between both websites , some of the content will appear on both websites.
Please read the project and ask me questions before you bid on the project.
Any generic answers like " we understand your project and we are ready " will be rejected. You must state your methodology and give me a real answer to this.