I get the CW on 91 W (Galaxy 17) just fine with MyTheatre (4.00 Beta 11). Maybe something else is different/amiss for you. I can set FEC to Auto with the DVBWorld 2104C USB receiver and it scans.
Also, I didn't know there was a LPB signal on 101 W (SES 1). There is a LPB mux on 87 W (SES-2) and...