T-Mobile customer -updtd OK from HTC site...
Started reading more about this and I managed to update my T-Mobile HTC Hero phone using the update issued from the HTC website just following the instructions on their site. Accepted my serial number ok and let me download the firmware.
I purchased my handset from an online company that is well advertised on this site :D. The handset was unbranded so it had no T-Mobile logos on.
My firmware version was previously build 1.76.405.6
Ran the update forgetting to back up my photos and Footprints but luckily they were stored on the card and were still there after the update - phew!
I am now running a snappier interface - Not sure if all those valuable mili-seconds I have saved have been worth going through the update but I can now sleep better.