Can anyone share his experience of using Sensaura on a VIA Envy24 sound card (like Terratec DMX 6fire 24/96, Terratec Aureon 7.1 Space, M-Audio Revolution 5.1 or 7.1, Audiotrack Prodigy 7.1)?

I've tested it recently on an M-Audio Revolution 5.1 sound card. I've used the "revo51_win_1.0.0.0.exe" drivers and this is how it worked:

Windows 98 SE - can't enable Sensaura at all. It's not listed in the dropdown in the Surround Sound tab. Choosing it via right clicking on the M-Audio tray icon and selecting Sensaura does nothing.
Windows 2000 - Sensaura can be enabled and partially works. DirectSound3D positioning works via Sensaura, but EAX is unsupported (RightMark3D Sound Bench shows it's not supported), Sensaura features are not supported (via sensinfo or in Player3D).
Windows XP - Sensaura can be enabled and almost everything works. DirectSound3D positioning works, EAX is supported up to 2.0, I3DL2 reverb works, MacroFX can be enabled. VirtualEar says the system is unsupported (the cwcspud.vxd file is present in Windows/System, it's not the message about not having a "qualifying product"), even if sensinfo shows VirtualEar as supported.

I'm especially interested about Envy24 cards that work on pre-XP systems, and VirtualEar works for anyone on an Envy24 sound card.