Hi Jeffrey, thanks for answer and let me give You more info.

This is exactly what ill do:
> Or are you trying to install m0n0wall on the 20GB disk which you will then
> move to a machine which will run m0n0wall?  If so, than overwrite that
> disk. But keep in mind m0n0wall will run comfortably on a 16MB "disk".
> 20GB is a complete and utter waste.

The 20GB is the smaller which i have.

The print screen is now at http://www.procad.sk/safety_overwrite.jpg

I used this parameter: physdiskwrite [-u] generic-pc-11.img

thx. Peter