Sorry, I missed your post earlier. You need some additional software - the best is MapSource if you have that. You can download it for free from the Garmin web site though it does say you need an existing MapSource product to use it. However, someone else managed to use it successfully. Alternatively, EWView3 (costs) can be used or a program called Gardown (free). Whichever program you use, you need to choose a TpSelect format to match.
MapSource will currently take PCX5 format, but future versions won't, so I'll shortly be updating TpSelect to output in the new GPX format as well.
A good addition to TpSelect would be to build in a download capability, though that would take time!
PS: I'll probably move these posts to the TpSelect forum later