I use MyMobiler myself when I am coding for WinCE5.0 (not very often but I do know that it works.)
In your extracted MyMobiler zip file is three versions of remote.exe.
- remote.exe
- remote.exe.50
- remote.exe.40
The only one I have gotten to work on wince5 is remote.exe.40
Just rename the existing remote.exe file (remote.exe.wm) [you may have to click tools, folder options, and uncheck hide extensions for known file types]
Next rename remote.exe.40 to remote.exe.
After that you are good to go. Copy remote.exe to the device through activesync (xp) or WMDC (>XP) and launch it on the device. It was a bit funny connecting for me the first time - I click connect on pc, then had to click the tray icon on the device, and click connect.
Good Luck!
Link to Video Showing it Running 1