I know a girl who transfered from a UT school to Baylor this year because here husband was in Houston. So, it can be done. Transfers generally can only happen b/t the 2nd and 3rd year and many of the schools require step I scores before they will allow you to transfer. The texas medical schools are big and alot of people drop out, so they have openings. If you have a good reason to transfer and are a decent student then you can probably transfer.
-tm