Okay, here's one thing that I've tried out. I went to the plugins page for this forum, and you will want to get a few things here:
http://www.emutalk.net/graphic-plugins/
First, get the download for Rice Video 6.1.0c and save it to your computer. From here you need to do two things. One, extract "BMGLibPNG.dll" to your >emulator< folder, NOT plugins. If you downloaded the 6.1.6 BETA instead, you will need to extract "BMGlib.dll" to your >emulator< folder instead. (OR if you are like me and have been trying the 6.1.10b version, you'll still want to have "BMGlib.dll" in your >emulator< folder).
Next, extract the "RiceVideoDbg.dll" and "RiceVideo.dll" to your Plugin folder.
From here I get a brand new error telling me that I am missing the "MSVCP71.dll" file. That's alright though, because you can find that somewhere else, I'm sure. I'm looking into THAT one right now... don't know if I'll FIND it though.
Also, you WILL get an error telling you that you are missing the ini file. Do NOT worry about THAT error. PJ64 and Rice's plugin will create one for you.
Anyway... that's the ONLY help I can give at this time, still working on it... though Rice's plugin doesn't look too hot for me on MY computer.
Edit: Alright, after digging through the archives and using the search feature, I managed to find a working solution.
From what Psyman over in the "1964" section of the forum says, you merely need to download 1964 and extract it's files. You'll want to have in particular TWO files: msvcr71.dll and msvcp71.dll. Place THOSE two dlls in your >emulator< folder, and then you will be able to run the Rice video plugin AND it's debugger (RiceVideoDbg.dll) without ANY error messages. Well, minus the "Missing ini file" message you get at the start... I'm not sure if there is another ini file that you'll need. So this looks like the answer.
Though it turns out that talking about non-supported plugins in this section isn't kosher, so unless it's still giving you trouble, we should stop discussing it... I hope this all helped you, and if not, go to the 1964 forums and they can give you as much help as you need.