No, you probably don't need a programming track booster -- use Programming on the Main instead of the programming track.
Take all other DCC equipped locomotives off the track, and use POM. If your DCC system doesn't step through configuration options to set CV 29 after changing the address, after you enter the new address program a value of 34 into CV 29.
After doing this, you then need to tip the locomotive over to remove power for a few seconds before trying the new address.
Changing the value in CV 29 tells the decoder to use the new, long address instead of 3. If you want to be able to run the locomotive on DC power as well as DCC, put a value of 38 into CV 29.
I just recieved the above, put it on my Programing Track and found that I could not write a new address to the locomotive. In the Sound Traxx Decoder's instructions sent with the locomotive the talk about this probablity and state that I need to purchase a Programing Track booster (PTB-100). Is this the case and will it correct this problem? I was able to program my two BLI Hudsons with out a booster and am wondering why I need to spend another $50.-$60.00 for this. Does this device have other benefits? I am not a tech. type person, so I would kindly ask: please keep your responses fairly simple!
Thanking in Advance!
NP 2626 "Northern Pacific, really terrific"
Northern Pacific Railway Historical Association: http://www.nprha.org/