I believe you will find your crash is coming from daktray.exe (the Dakota Control Panel). You can choose not to run it from msconfig.  You can control some things from the sound applet in control panel but others probably only from daktray.  I too get great performance from win 7 but have found no way to unload daktray without crash. Daktray works well but when you end the process, logoff or shut down it will crash. My card seems to remember the last settings but heaven help you if you need to change them. I have not tried running Daktray as a service but I don’t hold much hope. I can’t really gripe at Frontier for not having a driver/control panel at this point but I hope they do as I am going forward with windows 7.

Good luck
Bill Stone