In an WinXP-style user profile, the path to my Zimbra Desktop installation is somehow hard-coded. It lies in \profiles\user\Local Settings\Application Data\Zimbra, with the Local Settings being hard-coded to the english folder name (should be 'Lokale Einstellungen' in my German version of WS2003 and XP).
I'm sure there's a variable name to get to this folder; because with the hard-coded name, all the Zimbra stuff gets copied to my roaming profile instead of staying local - and it sucks when 1gb of additional data gets written over the net on shutdown and loaded on start.
I think the installer is to blame here, but I can't check right now.