Hey i dont know if this will help or not but... you can use a prog called QTparted its on the MEpis install section of there cd. i have a creative Zen and its normally Fat32 but i got it to be partitioned for ext.3. it takes some time. it doesnt work all the time but eventually it does.
first i had to delete the existing partition then create a new one with ext.3 sometimes it works but sometimes it doesnt.. the important thing is one it says it is now ext3 go to the test linux partition section and see if it runs into any badblocks , as mine occasinnally did. I have so far managed to put slax on it...my problem is i just havent gotten it to boot from my computer yet. maybe its my computer!?
by the way. i just did this all today ..