You could probably write a simple and uncomplicated line of code to display the XFire Mini-Profile inside the CB profile. The mini-profiles are a feature of XFire, so the only thing your script needs to do is take the user-supplied username, and place it in the image url to the mini profile.
Example:
My XFire mini profile:
The XFire website automatically generates these, you just link the image.
miniprofile.xfire.com/bg/sf/type/0/mrbugman.png
Changing the username of "mrbugman" and inserting the username your user supplies in the profile field.
More info on the profiles here:
www.xfire.com/xf/modules.php?name=XFire&file=miniprofileinstructions
Hope this helps. =)
- Russell "MrBugman"