Just noticed, some links in my last post were cutted. Already corrected.
The driver for Omicom S2 card is new, with build-in new BlindScan extensions. Blindscan realised inside driver, see Omicom SDK - http://crazycat69.narod.ru/sattelite/wip/omcbda-sdk.zip

I think, Rel will be interested in this info. There is a way to add Blindscan feature to DVBDream, using existing CrazyCat's streamreader with Blindscan support. CrazyCat wrote it 2 years ago, and there was many updates since. So now streamreader supports many DVB-S and DVB-S2 card, based on demodul...

Use BDA_ALL.dev module file instead of BDA.dev, SS2 eXpressHD should work with it properly, at least in DD 1.5.