| Since you're using XP, I'd first get the 680 and 650 syncing before dealing with your Treo Pro. Therefore I'd reinstall the Palm Desktop 4.1 that comes with the 680. The 650 should have not problem with that desktop as long as you're using different HotSync IDs with those Palm OS devices.
The Treo Pro with it's WinMo 6.1 is another story. Someone else here can probably advise you on whether both the Palm OS and WinMo can run without corrupting each other, I just don't know if there is any inaction between them during the install or thereafter. Tho' I'd keep the PIMs separated, WinMo with Outlook and Palm with Datebook etc.
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___________________________ 180 > 270 > 600 > 650 > 680 |