I am asking help for Suse Linux Entreprise Destop or Server, version 11.

Working with old generation Thinkpad T40 from IBM x85 infrastructure, I need to set up SLED version 11, booting with WinGrub without success. It seems that Wingrub can't recognize file system from version 11 and above.

The latest version with success is version 10 SP4. Wingrub can access booting files in linux partition so that it boots.

Any ideas to solve the issue?

Background: for Thinkpad laptop, there is hidden partition to restore windows system installation when needed, which is only accessible by original MBR written by IBM. Thus any third party system, such as Suse, it should not overwrite MBR by Grub, otherwise no chance to recover such hidden partition function to restore windows installation.