Using userid on a Different Page

[sharpkiller]

Hello again,

I've completely written my hack in PHP, and now I'm actually looking to integrate it into vBulletin 3. So far I have created a vBulletin page which executes my php code. However, in order for this to work as intended, I'll to add a link to this page somewhere on thread display. I'll also need to pass the userid of the original poster, the threadid, and the userid of the user who is using this hack. However, I'm not certain how I might accomplish this.

Thanks for any help you can provide.