DOCUMENTATION
Can I use my mac formatted iPod under Windows?
(back)
Yes you can, however you'll need an additional software. I never tested it but a working one should be MacDrive by Mediafour (this site isn't affiliated in any way to this company).
Once installed your iPod should be recognized as a removable disk and you'll be able to use YamiPod normally.
There may be other similar softwares available.