Some more FileOperations tricks:
Delete an Existing File:
<characteristic type="%CE17%\Office Mobile\icon.lnk" translation="install">
<characteristic type="Delete">
<parm name="ForceDelete" />
</characteristic>
</characteristic>
Delete an Existing Folder:
<characteristic type="%CE11%\Games" translation="install">
<characteristic type="RemoveDir" />
</characteristic>
Variables for Standard Directories:
%CE1% \Program Files
%CE2% \Windows
%CE3% \Windows\Desktop
%CE4% \Windows\StartUp
%CE5% \My Documents
%CE6% \Program Files\Accessories
%CE7% \Program Files\Communications
%CE8% \Program Files\Games
%CE9% \Program Files\Pocket Outlook
%CE10% \Program Files\Office
%CE11% \Windows\Programs
%CE12% \Windows\Programs\Accessories
%CE13% \Windows\Programs\Communications
%CE14% \Windows\Programs\Games
%CE15% \Windows\Fonts
%CE16% \Windows\Recent
%CE17% \Windows\Favorites
This space reserved for future tricks. Incidentally, if someone knows of a way within _setup.xml to force a reboot after install, I'd appreciate knowing it.