Heya - You can do it easily, just replace the main raincoat xbe file with Evox' xbe (name it the same), plus have the evox.ini file in the same directory. You must patch the xbe with habibi (use xbedump) otherwise you will get an error. That should work alright.
I've got my Mech assault save game hack setup to first boot to Evox, then if I need to flash a Winbond, a link to use eurasia.