Usergroup and username listing on index.php?

I need on the first page after a user logs in (index.php) a list of current member names and what group theyre in displayed to all members,
for example

Administrator: Nickname1, Nickname2, Nickname3
Support Crew: Nickname4, Nickname5
Sales Crew: Nickname6, Nickname7

How can i do this?

Thanks in advance,
Dammit

[Mike Sullivan]

You need to break down the currently browsing users in to user groups? Well, that'll need hacking. Want me to move this there?

And can you enter your license info into your profile? See link in sig. Thanks!

not the users currently browsing the board, all registered users.

please move it if it will require hacking

[Kier]

Moved to hacks forum