eriktorbjorn: As noted on the
main GitHub page for it, that is the game engine that was merged into the development version of ScummVM. I know the ScummVM version works around some minor glitches (and quite possibly introduces some new of its own), though at the moment the difference between them probably isn't that great. So whichever works...
Yeah! I also played Zork Nemesis with the zengine. I wanted to play it on an antique 1st generation Netbook with Windows XP and the processor wasn't fast enough for windows and DOSbox. So ZEngine was a great solution.
As far as i can remember the installation was a bit hacky, but the game run smooth and i've played it through with out any issues.
On an Windows XP machine i would suggest the original ZEngine. You can download binaries and it was build and tested for this case.
For Windows Vista and newer, MacOS, or Linux a current development snapshot from ScummVM might be the better way, but there may be dragons.