Sadly he's still a little buggy, so this can only be considered an Alpha release, but you can at least play with him for yourself.
Known major issues are:
1. No facial animation.
As a say: There are plenty of bugs to iron out, but it's still fun to see what's possible thanks to ResidualVM!
To see hi-res Manny in Grim Fandango for yourself, simply drop the following file into your Grim Fandango folder (where your DATAxxx.LAB files live), and run ResidualVM!
None of your game files are affected by this!