Windows 98 startup probs

I wrote my HDD to "0's" using Powermax and now my Floppy won't recognize my windows oem start up floppy. All it will recognize is the Powermax diskette when I put it in. I can get the A: promt up with the 98 disk in but it will not accept any of the commands I have a tried.

If I reboot with the 98 floppy, it gives me the "non system disk error" response....plz help