No HotSync? No problem! ChangeName allows setting a custom HotSync and User ID directly on your Palm OS device. It can also be used to set fake ROM IDs and OS versions to circumvent app compatibility checks in some scenarios.
Note that ChangeName applies all values to the entire OS. To set HotSync IDs on a per-app basis, see MultiUserHack. However, while MultiUserHack only runs on Palm OS 5, ChangeName supports many older versions of Palm OS as well.
(Based on user feedback)