@ Paul
Have you seen yongzh updated source from 10/11. November ?
http://sourceforge.net/projects/n64oid/files/
But don't expect anything usefull. 
The main change in this source-code update is that Yongzh removed his gles2n64 source. This is really sad, because he fixed a lot of problems, and now all that work is basically lost to the open-source community.
Besides that, there have been three changes:
1)
Speed Factor. This seems to be similar to "Fast Forward", except it allows you to specify an arbitrary percentage (so could also be used to "Slow Down" as well). However, all the useful stuff has been moved to the audio plug-in (to keep it closed-source), so there's nothing useful I can use here.
2)
GameShark Button. I'm not familiar with what this does, but I don't see a lot of new code related to it, so I'd guess most of the useful stuff for this is also in the closed-source sections (I'll look at this more closely at some point).
3)
Cheats. Processing seems to have been moved to its own separate thread. Most if not all the code for this seems to be present, so this is probably something I can use. I'll have to look at it a little more closely, though to see if anything important is missing.