How to get Heartgold/SoulSilver working?

So I haven't touched emulators in about a year because I've been busy, but last I remember, there was a pretty lengthy process of getting these two games to actually work without constant crashing/freezing/save issues. I eventually got it working, but the computer that I had them on no longer works. I was using either Desmume or NO$GBA, I tried using both, but forget which one ultimately ended up working.

I was wondering if there's been any progress on getting more stable versions of these roms out, and if there isn't, is there a clear write-up somewhere of where to get the roms and the steps needed to make them fully functional?

I tried using the search function, but couldn't find a whole lot.