[IRSs10] What Versions of Power InRoads can Coexist with SELECTseries 10

When I tried to install Ss10 to test our workspace, it complained another version was installed and must be removed. As a support person, I need to maintain the same versions as our users. Is there a work-around.

Currently I have both Ss2 and Ss4 installed and operational with out dual standard workspace with no issues.