MOSS 2007 and WSS 3.0 are using the same search engine. It only differs in the options that are available to each of the products. As expected, MOSS 2007 has a lot more functionality then WSS 3.0. Where WSS 3.0 is only able to use contextual search (as in: this site, this list), MOSS 2007 can be configurated...
To modify the results of the peopleresults.aspx, a few stepts have to be taken. In my case, a Division is added to the results. at first, make sure that the property that you want to display, is indexed so it will be part of the People Search Scope: Go http://MOSS2007/ssp/admin/_layouts/MgrProperty.aspx...