Ok, so I was lazy and didn't write a tutorial, but the PyPRP code is waiting for developers' review !
I can't seem to get the hang of GitHub, though - I managed to get the required code in a pull request, but it seems GitHub doesn't allow you to upload a new version of the files directly through their website - I had to manually copy my changes to the online version Meh, I should try and use it more often.
Also, the PyPRP version I was using was outdated, which means I had to merge the newest version with my code to make sure I didn't revert anything.
That was a bit annoying, but the weirdest thing is, I realized this outdated version was missing some features... which I wrote myself ! Meaning somehow I managed to reinstall an older version of PyPRP after these changes got included in the plugin
Anyway, even though there is no tutorial, there is an example Blender file ready - it contains the AlcScript, along with a basic telescope mesh to make sure the avatar's hands line up correctly.
https://www.dropbox.com/s/x0ai1f0gt7pnw ... blend?dl=1
BTW, I didn't use the code Deledrius and Hoikas wrote - it's still basically the same, but at some point the AlcScript differs. IIRC, my version is case-sensitive on advance and regress type - I was too lazy modifying it...