KB 939796 details a good way of sequencing Office 2007 in a SoftGrid environment. If this all sounds like a foreign langauge to you, it really isn't. SoftGrid is now part of the Microsoft Desktop Optimization Pack.
The best way to think of it? Let's say for some reason you want to run Outlook 2003 and Outlook 2007 on the same desktop. Softgrid helps make that happen.
I am, however, curious why they force the Office 2007 applications to use the 'classic' search and not use the integrated indexing software of Office 2007. I suspect it is due to the way the indexing service is implemented. If any Softgrid experts out there know why, please let me know!