Texas has a number of excellent programs but they are isolated within specific school districts. Given that it is many months to the fall start of the 2011 school year, another approach would be to abandon your effort with the current ISD, find an ISD and program in Texas that will take your kids that you like, and then move. You have lots of time to do research and reach a decision but you would have to start now because most ISDs shut down after May.
Since you have Ruf's book, you can look up her school types and then contact TX GT association for a list of level IV and V schools and then start there.
http://www.txgifted.org/
