we have ports ready for MOL (well if you compile it with gcc4 you will miss the sheep ethernet driver that "bridges" your real network card with the virtualized one), and we were thinking to explore EUAE after PianetaAmiga, but we had heaps of things to do plus we had the big huge HackMeeting in italy so there was no time for that yet... i hope to play with that next week.
Anyway MOL, mac on linux, is the one thing of applications that require you to have a configured and self-compiled kernel, because during building, MOL will build its own kernel module for emulation, and it can't do that if you don't have an already configured and "make depend"ed kernel.
If you got that far, i'm sure that you're able to comple your own kernel - it's not that hard: it only involves knowing what hardware you have and which components make it up... it has nothing to do with programming.
Crux is source based (like gentoo) so installing or updating anything implies compiling it (even if that's automated by Ilenia, the port and package management system).
The ready to use archive is pretty handy, and as i wrote before you can "upgrade" it to full CruxPPC system running setup from the install cd (or from an image, a copy on hd, an nfs share it...).
You might then have luck with MOL if you get the very same kernel version, untar it in /usr/src/linux, gunzip /proc/config.gz in /usr/src/linux/.config, do a make depend, and then compile and install Mol from the port (i will send you the updated port if you can't find that on the cvs).
good luck and have fun! :)
nullpointer _at_ cruxppc _dot_ org