A must-have for registering shareware! HackMe is a small system utility that allows setting a unique HotSync ID for each app on your device. Unlike similar apps, it does not require a hack manager like HackMaster to work, even on older versions of Palm OS! Just select an app, choose a HotSync ID, and save!
While HackMe generally has the broadest compatibility, for an alternative HSID manager with a more robust interface, see MultiUserHack.