You must have a fat32 support in kernel. It is usually compiled in, if no, you will have to recompile kernel
.
If yes :
1. Make a empty directory to mount win partition in it.
2. Type " fdisk -l /dev/hd* ".
This will list your disks and partitions
Find your win partition. In example it is /dev/hda2.
3. mount it :
$ mount -t vfat /dev/hda2 mount_point
and "mount_point" should be dir created in 1.
After that you will find content of win disc in this dir.