If you get a b/w picture on your TV in NTSC mode, obviously you're not using a scart RGB cable. If your TV has a 21-pin scart socket, I recommend getting such a cable from Ebay. The image quality will improve a lot!
Ok - I'll check out my TV sockets, etc
I love the Amiga and own several such computers, but honestly, I don't see much fun in trying out these - the MT-32 support is identical to the PC versions, while the graphics are poor straight conversions. (Yes, I've tried them in WinUAE, and the MT-32 support does work.)
Yes the amiga conversions are poor - and so the music is even more important. And hey it's IMO pretty cool to have amiga-midi-support in Sierra games. But even Amiga geeks don't know - so I updated wiki: http://en.wikipedia.org/wiki/List_of_MT-32-compatible_computer_games
BTW: Have a look at the Amiga "Rise Of The Dragon" Box
I have no Dragon MT-32 sound on Amiga - are there other versions?