Guys, you must be sleeping. Really.
You can convert wave-files very very very very VERY easily to SD4EII format with
EMXP,
E-synthesist's (member here) own software which he dedicated to the community. So quickly check it out:
http://users.skynet.be/emxp/ runs on windows XP machines.
Still, you have to edit the samples on your EII, but transferring them to the mac as SD-Banks is easy as 1,2,3. Of course, you should be able to edit the banks in SD instead on the EII itself, too, but I'm no expert there...