{$vbulletin->userinfo[variable]} STUFF

[evenmonkeys]

Okay... I've got a few questions...

Question 1
How can I use {$vbulletin->userinfo[variable]} in <if condition> statements? When I put that in there, I get an error saying I can't do that. So how would I do it?

Question 2
Why doesn't {$vbulletin->userinfo[signature]} let bb code work? I'm making a custom page without using an actual php file and I was told that {$vbulletin->userinfo[variable]} should pull everything. However, when I use {$vbulletin->userinfo[signature]}, it pulls exactly what's there. ie: [img]sadfsad[/img]

Question 3
Why doesn't <img src="{$vbulletin->userinfo[avatarurl]}"> work? Is there something else I can use to make it work?

HELP ME!!!