mia,
one of the main problems with your entire argument is that Evolutionary theory is actually the attempt to falsify ID. think about it historically. there was a time when most scientists assumed that the world was designed by God (it didn't seem to slow down science at all by the way), but darwin came along and purported to show that "Biology is the study of complicated things that give the appearance of having been designed for a purpose." (this is a Dawkins quote!). you see darwinism is the attempt to show that the biological world is not in fact designed. the question is whether or not it has succeeded. after 150 years has darwinism shown how information is added from one generation of species to the next (a necessary first step if we are going to trust that a species can change into another species). i would argue no. in fact, what we see is that when something comes along which looks to have more information, it actually is just a rearrangement of previously existing information. fiddling with pre-existing genes and coming up with a non-functional fly with extra wings, is not an example that satisfies the challenge i am putting forth.
in addition to this, whenever we see design in the world, we find that it was in fact brought about by intelligence. i am not speaking of merely complexity or low probability, i am talking about specified complexity. this is what ID is attempting to quantify. Dembski has done some excellent foundational work on this goal. admittedly, more needs to be done.
as for tests....ID has predicted several things which have turned out to be correct. for instance, ID predicted that "junk DNA" would be shown to be not "junk" after all. in the past couple of years, this has proven to go in ID's direction as junk DNA has been shown to have some important functions. vestigial organs would also be predicted to have a purpose in an ID model....over time we have found that many of the organs originally thought to serve no function and to be holdovers from earlier species in our ancestral lines evolutionarily speaking have in fact turned out to have functions after all. a few remain, but a mere fraction of what originally existed.
keep in mind that it is evolution that would be the "science stopper" in cases like vestigial organs because science would have less reason to keep seeking functions for organs deemed to be merely vestigial organs. on the other hand ID would keep the pursuit going with the belief that what we see was designed by intelligence.
as for falsifiability of ID...here is an article written by Behe in 2,000 which does a far better job answering this false accusation of ID than I could hope to without going back to school for 8 years.
is ID falsifiable?
however, i would like to propose a question to you....is evolution falsifiable? after all (to paraphrase Dembski) to disprove evolution one would have the burden of proving that NO conceivable darwinian pathway could explain a particular organism or feature of an organism. how is that falsfiable? if ID'ers point to such irreducibly complex features of organisms and evolutionists have no pathway yet, all they must do is come up with some bizarre pathway, regardless of how likely, and claim moral victory that it is indeed possible.
in fact, this has happened repeatedly in descriptions of how early life arose on the planet. first it was in primordial soups, but when we discovered that such "soups" were not very conducive to life in the earth's early atmosphere, the new "conceivable" model was deep in the ocean where the early stages of life could be protected while they evolved. the point is that we don't have any clue how early organisms evolved to the point at which modern scientists believe they know how they evolved forward (i am not speaking of abiogenesis here just how we got to the first cells when we know there were earlier predecessors but we have no idea how the earlier became the cells we know of).
so is evolution falsifiable? how?
here is a good article on this question by Dembski:
is ID testable? evolution?