Using vB for accounts outside of vB

[MCJim]

I plan on using vBulletin to take care of user accounts and registration for the entire website rather than just the forum. How difficult is this and do you have guides on it?

I would like to have user stats such as number of website page views and scores from games that the users play outside of the forum. Would it be easy to implement this into their vBulletin accounts? Basically I need to know the limitations and/or difficulties of using vBulletin to take care of user accounts for my entire website.

Here is an example of a website that (I think) does this: http://www.ultimate-guitar.com/

Thanks