Knumb...
I think you might want to try the WM5 GPS utility to experiment with COM Ports and baud settings, but you might want to try COM1... I think I was able to get the SDIO GPS working once in a while using COM1. COM4 was another that worked on occassion. You also might want to do a soft reset before putting the card in the CF slot, and do that everytime you change a variable.
Anyway... if you get the right combo working in the utility, that is... the sats show up and you get a fix, then worry about getting TT paired up. But you've read all the garbage I went through, and now with the BT all seems OK.
I do wish you luck. Sooner or later TT will support WM5 and CF/SD GPS devices. But right now, you are going to have to mess around a whole lot.