Scripting QEMU: How to copy in files, start the virtual machine, and copy files out?

Question

I'm running a Linux guest on a Windows host (using WinQEMU), and I would like to have files copied to the guest and back to the host. I don't suppose it matters which initiates the transfer. But I don't have Admin rights on the Window side, so I can't map a drive letter to a virtual disk. Also, from the QEMU docs, the TFTP interface only allows the guest to read files from the host, but not vice-versa.

Any ideas?

Edit: It turns out that libext2fs compiles under Cygwin. There's a tool included called debugfs which allows you to read and write ext2 disk images. So far, this is working out pretty good.