You can use an iso to run Mepis. Just type:
qemu -cdrom SimplyMEPIS-2004.04.iso -boot d -user-net
You need to replace SimplyMEPIS-2004.04.iso with the actual filename of the iso
Or if you're looking to install it first run: dd of=hd.img bs=1024 seek=3000000 count=0 to create a hard disk image (change seek to whatever size you want the image to be, in this case around 3GB).
Then run:
qemu -hda hd.img -cdrom SimplyMEPIS-2004.04.iso -boot d -user-net
You can then install as normal using the MEPIS Installation Center and from then on boot with:
qemu -hda hd.img -user-net.
You're on your own in finding a tool in windows that does the equivelant of dd in Linux though
See http://qemu-buch.de/d/Gast-Systeme for further information.
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