Every profile can just have one quota, right?
Using Jamroom
Try this-
On your actual online site, there should be a link for "ACP" at the top (this link is not visible to regular members, only to admins). The drop down in that --> go to USERS, then from there you'll see where you can Browse Users, Browse Profiles, and Browse Quotas (the various roles that site users can be set as).
Incidentally, if you simply click on ACP, you get to here:
http://yoursite.com/core/admin/global where you can get the hang of where all your skins and modules are, and change some settings.
I hope this all still applies even through you are using site builder and I'm not, or else... just ignore my instructions! =8-*