Nope. Doesn't work when putting registry entries in either the "conditions" or "greyed conditions" field. If that's what you mean by opposite effect. Also, I assume registry condition will accept keys other than HKCU, like HKLM? Again, my issue is that when I put any entry other than registry in greyed out condition, the application install is indeed greyed out. With registry entries, nothing changes, like the entry, below: [HKEY_CURRENT_USER\Control Panel\Cursors] @="" "Scheme Source"=dword:00000000 "Arrow"="F:\\1SYSTEM\\1cons\\Cursors\\Red.cur" This is what I have tried under both "conditions" and "greyed condition." RegKeyValue("HKEY_CURRENT_USER\Control Panel\Cursors")=="F:\1SYSTEM\1cons\Cursors\Red.cur"