Show member avatar for guests on custom template page

[gigaenvy]

Hi,

I am trying to display the avatar of members on a custom template page for non-registered guests who visit. The avatar shows fine if the user is logged in, but for guests and those not logged in I get the GD default Vbulletin image being pulled from image.php?u=0.

Is there a way to show member avatars on custom pages served by Vbulletin?

Current code is the following:

<a href="http://www.domain.com/forums2/profile.php?$session[sessionurl]do=view"><img src="http://www.domain.com/forums2/image.php?u=$bbuserinfo[userid]" alt="Some avatar" border="0" /></a>

Thanks for any help that can be provided.