Too bad you don't know which .prx files they are. The ones that came with your version of Map This! work for me too. I was just wondering if later firmware version .prx files could work with earlier FW versions. Since you are on 3.40 OE-A I thought maybe you were using later FW .prx's than me. I'm using which ever came with the green screen test for my Map This! .499 beta.
The weather sucks all over South FL today and they are saying it will be the same for at least the weekend. But you know we've been desperate for rain all over FL. I think Lake Okeechobee is like four feet below normal.
The cable is working great! I'm very happy with it so far. Did you see my latest pics (posted earlier today)? I managed to add a spring loaded pin from a charger/stand I had laying around in a drawer. I haven't gotten to add the ground line pin yet but will hopefully get a chance to this weekend. It locks on really fast now and usually has a couple or a few satellites in view immediately after starting Map This! Check out the thread (CPU clock speed) and drop a note letting me know what you think.
Testing your version out for the first time with my cable I got three bars in a steady rain (totally overcast) and under my screened in patio which has a three to five inch thick insulated hard top. Pretty impressive. I wonder why we get such better satellite reception here in FL than others do even outside the cities?