it was build for the 160 baud aldl bus off the older ecu's and the developer never updated it for the 8192 baud aldl found in the vr and onwards (from what i remember reading) ecu/pcm's, but between tunerpro rt and efi live you can sort out almost everything anyway.
another thing to note on older ecu's, if you run a vr manual memcal in a vn/vp auto/manual 808 you lose the 160 baud aldl (worked this out when trying to hook a gm tech 1 up and couldn't work out why it didn't work), need to add a mod to get the 8192 baud working.