if you run the Symantec.Components.Generated7.Altiris.Resource library and edit the generator, you'll see hundreds of web service components that aren't included by default but that are made available to you through the generator. This generator queries all the SMP web services when you load it, and finds all exposed web services, including ones for any custom data classes you've built. it's not easy to dig through, but you may find everything you need in there.
Once it completes, it'll seem as though it's started over, but just run it the second time and you'll get to where you need to be.
click "Adjust definitions" and you'll find this window:
select the ones you want to load and next through the rest. if you decide to use the "Search", don't just start typing, because it immediately tries to find the one letter you've typed in all the results. type your search string someplace else, copy it, and paste it in the search box.
I hope it helps!
-andrew