You can't get into mandrake? Did you load the boot loader onto one of the hard drive's partition?
You should be able to use the dd command from a linux live CD to copy the boot loader out, and then just copy that file onto your windows side and edit the boot.ini file to add a line with that filename in it.
I forget off hand the exact dd command you need to use. Something like
dd if=/dev/hda1 of=/my_lilo_boot_file count=1
This "should" copy the lilo boot area to a file called "my_lilo_boot_file". This example is if you used an IDE hard drive and installed lilo on the first drive on the IDE channel on the first partition on that drive (hd <-- stands for IDE hard drive, a <-- stands for first drive, 1 <-- stands for first partition, so if you used the second drive, with and the first partition on the IDE it would be /dev/hdb1, or if you have a second IDE channel, the it might be /dev/hdc or /dev/hdd, etc., etc.,... if it is a scsi drive, then it would be /dev/sda, /dev/sdb, etc....) Read up on the dd command some before you use it, you can do a lot of damage if you mix up the "if" with "of" ("input file", verses "output file" by overwritting your partition table on the drive...).