Marcin, Roy,
If we are only running XXHighEnd and RAMDISK then these are the services that need to run for a relay Vista boot. This is for a none service packed build of vista but should be ok with later packs. Other services may be needed to install different sound cards. This list is fine for the M-Audio Transit and HIFace.
Watch your DPCLAT drop as you stop the other services
1) COM+ ENENT SYSTEM
2) DCOM SERVER PROCESS LAUNCHER
3) Group Policy Client
4) Mulimedia Class Scheduler
5) Plug and Play
6) Programme Compatability Assistant Service
7) Remote Procedure Call (RPC)
Shell Hardware PRotection
9) Software Licenceing
10) User Profile Service
11) Windows Audio
EDIT
12) Windows Audio Endpoint Builder
13) Windows Driver Foundation - User Mode Driver
14) Windows Management Instrumentation (needed for RAMDisk to work)
END EDIT
What I do is set all other services to "manual" then reboot. Look at services again and some of the unwanted ones will have started again. For these restarted services I just set them to "Disabled" which stops them getting in the way.
I’m still working on the Autoruns which I will post soon. Have a go with this services and the registry tweak I just posted. The Services and the regedit tweak deliver a lot.
Nick