College Planning

Well, if I hadn't been deployed to Iraq, I would be starting classes at PSU in about a week. Now that my original plans have been crushed under the oppressive heel of the United States Army, I have begun to reconsider where I will go to school and what my area of study will be.
A year ago I was set on going to Penn State and majoring in computer or electrical engineering. Since then, my parents moved out of PA to WY and I found out that tuition at state schools in CA is free for residents. It would be a simple matter for me to change my residency to California and take advantage of the free tuition. I have been looking into UC Berkeley, which is a state school with a great acedemic program and engineering department. I have also been looking into Carnegie Mellon University, a school that I was considering before I joined the Army, but I was, and I still am, skeptical of my chances of acceptance. I would really like to go there, so I am still going to apply. I would still like to major in a subject dealing with computers, because I enjoy working with them and I am pretty good at it. There are a lot more subjects that deal with computers than only the ones in which they are the primary focus; nuclear engineering and aeronautical engineering, just to name a couple.
The only problem is that I need to take the SAT II: Subject Tests in three subjects to apply to Carnegie Mellon and to Berkeley. I am hoping to get some leave in the beginning of October so that I can make it to the test that will be given on October 9th.