Ok here is the deal back about a month ago a new Radio came out that was supposed to fix bat problems and gps neither of which woirked very well. When bamf 1.5 came out it was based on the leaked radio as are all the froyo roms after it including 1.7. Like Jax said base band ending 402w. If you are stock rooted you are not on it. Ill try and find it and post it. You do need to be on it or you wont be able to flash the rom.
Here is the link for the radio http://www.multiupload.com/2VDSQ6SBAZ
Mine ran on it...just didn't run great. Maybe I need to bring phone to factory settings then download everything again. Also first time titanium sort of crashed so it didn't do everything the way it was supposed to. Might try using something else to back things up.