I tried AllComputerResources and CarComputerExhhange, and BOTH were an epic fail. After not being either "flashed" correctly or simply being a faulty unit, both companies had to send out a replacement for the replacement, and all four total units failed. Kolak set me up with a factory replacement and it worked on the first try. Kolaks pcm was about $200 more, but worth it for a working jeep.
1997 ZJ Laredo, 4.0, 42re trans, 242 T-case
1994 ZJ Laredo, 4.0, 42re trans, NP231 T-case