Create A Forum - Support Forums

Hello i have made an option for my users to purchase VIP for 1 month, however i want a badge to show when they post:
 
Example of when they post:
 
[Their Name]
 
VIP
[The Graphical Badge]
 
any ideas how i can do that it is quite popular on other forums and iv'e seen it be made with this online software   
 
 
NOTE: i can design the badge i just want to know how it can be added to their name
 

Look at my forum site, is this what you want? - mcschematics.net

nice!
How did you do it?
And also the credit card donation button.

Check out mine!
Only one board is visible to guest which is obviously a redirection board to registration page.

But also including yours with make it excellent!
www.naijagurusforum.createaforum.com