unit test with finalbuilder , how to select subsets of tests

I just write unit tests for my application. The test case runs well using the DUNIT GUItestrunner or TextTestRunner. We want to execute the test cases every time after a build of the complete project using Finalbuilder Software. If I build the complete project onto a large Computer with large RAM ... I may also run the complete test suite, where as our FINALBUILDER build server is a WIN 7 32 bit OS computer system with only 4 GByte RAM. Therefore we build every app in the 32 bit mode and have to take care on these limitations. The second issue comes from the fact that we implemented several optional testflows, which means our process may exist of 5 steps. I must execute the sequence 1 to 5, but for step three there are different Options like 3.1 , 3.2, 3.3 ...... . I select only one option, the other Options should not be executed.

Is there any way of storing the last selected testcases from my GUITestrunner UI into any Format/file and use this selection later while running the test with finalbuilder ( Action -> Testing Tools -> dunit)

What is the best practise for selecting only a subset from the existing test Suite ?