Ok - I searched Google for "Remote Desktop on Windows Mobile 6.1", and I found a file - WM6RDP.cab - at this location:
http://andrewblock.net/?p=85 . I figured out how to copy it to my 800W Temp folder. After installing and launching it, I have a working "Remote Desktop Connection" - it is not the easiest to navigate the big screen from my Treo, but it works! And it was FREE... I am really psyched! Thanks for your encouragement. This site rocks...