The manual states . . .

TV - Traditional TV, LCD / PlasmaTV and projection TV,TV part of TV / VCR, TV / VCR / DVD and TV / DVD combos

DVD - DVD player / recorder (DVDR), DVD / Hard Disk Drive combination
(DVDR-HDD), Blu-Ray player, High Definition DVD player (HD-DVD), DVD part of TV / DVD, TV /VCR / DVD and VCR / DVD combos

CBL/SAT - Cable box, satellite receiver, Internet Protocol TV (IPTV), Free To Air TV, High DefinitionTelevision decoder (HDTV), Digital Television (DTV) and Tivo

VCR - (SRP2006WM only) Video cassette player / recorder,VCR part of TV/ VCR,TV/VCR/DVD and VCR/DVD combos

DVR - (SRP2006WM only) Digital / Personal Video Recorder (DVR / PVR), Tivo

. . . so straight away I think it unlikely you'll get it to control your HT - and almost certainly not on one button. You may have some success splitting the functions . . .

How do I set up the remote control for combo devices (TV / VCR, TV / DVD, DVD / VCR, etc)?
Some combo devices require you to set up two different device selection buttons to control both parts of the combo device. For example, if you have a TV / DVD combo, you might need to set up the remote control for both TV and
DVD to operate your TV / DVD combo.

. . . but again, I think it unlikely.