assuming mint is a live cd
boot it
Code:
su
grub
root (hdx,y)
setup (hd0)
quit
if grub not found on cd...error will be command not found
if grub is good message after setup command will be grub embedded....succeeded
x and y depend on where / or /boot is read my signature for more info
but I suspect ms is on 0,0 so it will be 0,1 or 2 etc