Display username (not your own) on non-vb pages

[Digma]

Is there a way of showing a username other than your own on a non-vb page, while working with separate databases but within the same domain?

I've already got the userid stored in the other database under author id and would like to be able to show the username belonging to that when the entry is requested on the site.

Say someone has submitted a guide and he has userid 5,000. When he submits his content the userid is stored in the content database. Now when someone else tries to access the page where that specific content is on, I would like the author id to be linked to his username in the vbulletin database.

I've been trying to experiment using global.php, but either got my own username or Unregistered Users (when logged out from the system).

Can anyone give me a lead where to look further (already checked [How-To] vBulletin API Basics: Creating Custom Pages & Misc. but couldn't find the answer there).

Thank you in advance.

--------------- Added [DATE]1253790760[/DATE] at [TIME]1253790760[/TIME] ---------------

Hmmm, I think this should have gone into 'Programming Discussion'. Sorry for the wrong placement.