Migrating users from one vbulletin board to another.

[FockerFGAA]

So recently my site has been in talk with another sports site in taking on their users. We can just have their users sign up with new usernames and such, but i was wondering if there is a simple way to just migrate them over from their board to our board. we use vbulletin 3.7.4 and will probably be updating to 3.8.4 before the transition. they are running 3.8.2. i didnt know if it was just as simple as exporting them from the user table of their database and putting it in the user table of our database or if there are tools to make this transition easier?

any help would be greatly appreciated.