Hi Brian,
Unfortunately, none of the settings you mention above work with ViEmu/Word&Outlook. 'hlsearch' is all but impossible to implement under the Word model (they don't allow transient markers, if you insert markers, that changes the document) - also, tabs and the Word document model don't get on too well. ViEmu does provide hlsearch and some tab configurability under Visual Studio and SQL Server, but there is no way to provide the functionality in the Word/Outlook host.
ViEmu/Word&Outlook actually does read a _viemuwrc file, which should be in your home folder (typically, "C:\Documents and Settings\{username}"), and you can have :set and :*map commands there as supported by ViEmu (have a look at the documentation for details, you can reach it from the ViEmu Settings dialog).
In any case, I'm glad you are enjoying the vi editing model as provided by ViEmu, and let me know if you stumble into some other shortcoming.
Best regards,
Jon