Step 1: You need to get your javascript code from linkbucks that you are going to put in your vBulletin forum.
Step 2: On vBulletin login to your administrator control panel and go to Styles & Templates > Style Manager
Step 3: In the style that is your default for your forum go to the drop down menu and select Edit Templates.
Step 4: Now in the template editor scroll down till you find Header and double click on it.
Step 5: In the template put the javascript code at the very top of the template.
Then just hit save and you have now linkbucked your forum.
PS: This method also functions with other forum software like SMF
What are you waiting for? Join linkbucks and start making money now