Don't use Moslo. Use TPPatch to actually fix the problem, instead of working around it. Moslo is probably causing some of these problems. See my TPPatch article for information about it. If TPPatch doesn't work for some reason, try Newspaz's solution, which is still just slowing down the computer but works better than Moslo. The best way though is to fix the problem with TPPatch.

For Sound Card, you will want to choose Sound Blaster 16. Go into Control Panel->System and find SB16 emulation, and click Properties. Find out what the settings are (IRQ, etc.) and change the settings in JJ1 setup to these.

I can't actually get JJ1 to work on Windows XP or .NET for me, and I get graphics problems like what you described. It might just be that old DOS games like JJ1 won't work properly on these new NT-based operating systems. If anyone has had luck with JJ1 on XP, 2000, or .NET, please give some help here.