Yes it does have BDA drivers although there are a few issues with them when it comes to multiple card use. I'm glad to hear that you are going down the BDA track rather than DVBcore sub.
I also own a FusionDVB-t card. Â Having dealt with you in the past for support for this great prog, I would be happy to send you my DVB card if that would help at all. Â And of course I would be eager to help in any other way I can.
At the moment there is no decent HTPC alternative to the bundled software (IMHO Showshifter doesn't count). Â This would be a welcome alternative.