newbie question on adding tools to vbulletin

[colm]

hiya,

i work for a small isp where we use vbulletin forums (3.6 currently) to help support our customers.

we now have a requirement to provide a web tool to our users which would show a user their bandwidth usage over the last 30 days or so.

i've already devloped such a tool for internal use based on perl and gd::graph.

since most of our customers are happy using vbulletin i was wondering how difficult it would be to integrate a tool like this directly into vbulletin.

the idea would roughly be that -
1) user enters hidden auth details in their profile to access tools
2) new tool menu appears if auth detail present and validated against external auth db.
3) first option on tool menu will either run php which will pull data from bandwidth usage db and build graphs or could wget/curl output from perl cgi.

do you guys have any advise on setting this up?

thanks for your help,

colm