Controlling compression options from a driver

In a previous post I wrote about controlling compression for the Microsoft XPS Document Writer. Brian Mosher asked on the MSDN XPS Forum whether it's possible to programmatically control image compression from the context of an XPSDrv-based printer driver. This isn't possible in the Windows Vista release, but is something planned for a future release... 

(...and if you're wondering about IPrintOemUIMXDC::AdjustImageCompression on MSDN, although it might give a clue, please be aware that the MSDN documentation is currently incomplete in this area. Watch for updates rolling out over the next few months.)