[newbie] How to delete an ext2 partition under DOS

[Roman Korcek]

Hi guys,
I'd need some help.
I have a 20GB disk,
c: (/dev/hda1) is windows, 2GB, FAT32;
d: (/dev/hda5) is windows stuff, 16GB, FAT32;
/dev/hda6 is Linux /, 1.72GB, Ext2,
/dev/hda7 is Linux swap, 128MB (the rest).

Now my question is - how can I delete that /dev/hda6 partition? I need
it for windows at the moment and DOS fdisk doesn't see it. Not even as
NON-DOS partition, which would give me an option to delete it. What
can I do apart from Partition Magic which I don't have the money for?

Thanx in advance

Roman