ZG1 and other Pacesetter D100 Game systems

I recently picked up an old stack of "Timemaster" RPG books from Pacesetter. They also published the "Star Ace" RPG series. Both of those games systems use a very simular Action table as ZG (and are "d100" or "d%" systems.) I'm wondering if anyone has compared, contrasted, played, integrated, etc. any of these games? Both look like some great game worlds to bring into SF.