As I remember TS did not run on visit but Matrix did. As such DG will not run on Vista and since 7 is just Vista that has been fixed and streamline it should not either.
That having been said I thought a couple members were able to get the games running on Vista by using a different Direct X driver. You may wish to post a new thread asking if anyone got TS games to run on Vista.
Win 7 Professional / Ultimate use the seperate modul Win XP mode and with a dl from MS the games should run.
I plan to buy it next, than i can say if it works.
I create and revise: Order of Battles, Table of Equipments, Weapon Values for Modern Wars (in work: DG Lebanon War 1982 - 1985, DG Falklands War and again CWE!)