In order to see and browse the windows partition you need to mount it.
First create the directory where you want to mount your Windows file system e.g. /mnt/win_c
then issue the command:
mount -t vfat /dev/hdaX /mnt/win_c
where hdaX is your first HD (b for the second, etc.) and X th number of the partition (1,2,3 ...)
If all goes well you may want to add a line to your fstab to mount automatically at startup. Using the info from the previous command write a new line like this:
/dev/hda1 /mnt/win_c vfat defaults,umask=000 0 0