I\'m not sure about the C-760, but for the 5x00 devices, it is possible to install Qtopia 1.6.2 onthe device, and then you can sync with the desktop with Qtopia desktop 1.6.2 OR 1.7
Right now I\'m useing 1.6.2 on both and it\'s flawless, but I have an sl-5500
Be warned though, if you try this, there\'s a lot of differences between the sharp rom and wtopia 1.6.2, and you will find that you need to install a lot of other packages to get all of your functionality back.
Here is the web site for installing 1.6.2, I think it should probably work on a 760, though you will probably have to hard reset if I\'m wrong, so do it at your own risk.
http://www.apex.net.au/~twalker/qtpalmtop/