I suppose /dev/hda7 is ur mandrake root device, and /dev/hdb1 is ur windows system device. Ur /etc/lilo.conf is just like the following(pay attention to the red, which is ur lost):
vga=785
boot=/dev/hda
map=/boot/map
default="mdk91"
keytable=/boot/us.klt
prompt
nowarn
timeout=100
message=/boot/message
menu-scheme=wb:bw:wb:bw
image=/boot/vmlinuz
label="mdk91"
root=/dev/hda7
read-only
other=/dev/hdb1
label="win"
table=/dev/hdb
map-drive=0x80
to=0x81
map-drive=0x81
to=0x80[/color]
After u change ur /etc/lilo.conf, u must run /sbin/lilo as root. And then, ur windows will be bootable. Good luck! :lol: