Cannot revert to Opensuse Bootloader

HI All,

Much searching hasn't given me an answer to this yet but hopefully someone can help me out / point me in the right direction.

I've been using OpenSuse 12.3 happily for a few months and the Grub2 bootloader had the graphical OS branding. The other evening I installed Mint 15 on a new partition and it created it's own Grub2 loader with Mint as default and OpenSuse further down the list. It also reverted back to a basic text look without any graphical menu.

I dont have any problem booting into either system but I'd like to go back to the Opensuse 12.3 themed Grub2 (and add in the Mint partition).

I've tried played about with the bootloader configuration in Yast but nothing changes, I think that the computer is using another Grub2 on the Mint partition (it does have Ubuntu at the top of the menu screen).

How do I kick the original Grub 2 back into life firstly?

Cheers,
Andy.