"Further more, AND THIS IS NOT MY BELIEF, it is merely a hypothesis that I am wondering whether or not has the possibility for testing. If space aliens did do it, and we developed the technology to go there and learn the science by which they did it, what would we call this? And is it theoretically testable?"
If your theory makes preditions about things that can be observed (i.e. the extistance of a super-intelligent race of aliens living on Mars with vast knowledge of human biology and history) then it would be testable. This is exactly why the IDers dropped creationism in favor of ID, because creationism actually does make preditions about the real world (i.e. that it is less than 5000 years old, etc.) which turn out to be false. ID avoids making such predictions.
So, if we assume that we can travel to meet these space aliens, and observe them, it is testable? At which time you would consider ID legitamate science?