i'm not sure i understand what you're looking for...

afaik, the only influence you have on becoming an ultrapeer or not is whether you check the 'allow...' checkbox. and that only ALLOWS you to become an ultrapeer, it doesn't FORCE ultrapeer.

ultrapeer or not depends on factors that you can't influence with any options or settings, like your available bandwidth.

the only influence you have is make sure that your router passes port 6346 on to your machine.

but, again, being an ultrapeer is really not that cool, it doesn't give you substantially more search results and you can upload less because bandwidth is used for traffic communicating with 30ish instead of 3 hosts.