Using the old HTC wwe RUU (I've tried the two different recommended ones from the guides here at unlockr and Modaco) the RUU goes to the bootloader then on the PC is says 'waiting for bootloader' which then goes to error  USB connection error after about a minute (handset displays USB RUU). I've got adb and all the drivers. What am I doing wrong, I establish a sync with HTC sync (latest version ) before launching the RUU? Can I use Droid Explorer to help me or are these RUUs the only way of getting an old ROM on?
Can anyone suggest anything?
I've trawled the forum with search but can't find a resolution.