To the best of my knowledge, there's no way of working around it. Some years back (with an older version) it was possible to disable the toolbar and still have SA functional. Not anymore. I went to the SiteAdvisor specific forum at the McAfee Community Forum, to see if I could find anything to indicate otherwise. I wish I had better news for you, but I continuously read where it wasn't possible.
I'd like to use the McAfee site adviser tool on my internet explorer 8, but without the toolbar, just the BHO ratings search option still activated & have it stay that way every time I close & re-open an ie window browser. Is it possible to do what I as for the site adviser? if so, how? any suggestions?