Have you looked at the FAQ ?
You don't give any detail as to what you are setting up? If you only run BOINC projects, then there is no need to do any of this, just use the userbycpid page like mine for example, putting in your own cpid in the url.
If it's non-boinc then yes, you'll have to input your project id's. If you still have problems, let me know which projects you are on and the names in those projects and I'll get you started..
The forums are just the (vBulletin) forums, the homepage is just a vbAdvanced add on. A lot of people do not use the homepage at all and just stay within the forums themselves - it's a personal choice. But I'm not entirely sure what that have to do with the stats anyway?
Bok