Few months ago i have RedHat 9.0 and Windows XP on two drives. After few days i want remove RedHat so i use in recovery console in Windows XP fixmbr, there was wrote that this program can cause damage to my hard drive press "y" to continue, so i pressed y and type my hard drive, when i reboot my computer, an error appear that cannot load disk or something like that. So i use fixmbr again and adjust it to default and linux too can be load. ;( I lost all data on two drives. After big difficulty somehow i installed WIN XP. Now i want install Mandrake 9.2, and i'm affraid that when i want uninstall it the same problem happen. It is a way to prevent it ??
An why this corrupt my disk.....

You can try to not install grub on your mbr, so your current winXP bootloader won't be edited, see? There will be a step during installation when you are asked to.
But to do that, you need to tell mandrake to build boot floppies, and you'll have to boot mandrake everytime from floppies, if you want to not have grub installed on the disk.

Or install GRUB into the partition boot sector then use the Windows bootloader to boot it, this way you don't have to touch the MBR, there's quite a few threads on the topic.

Thanks, but how set bootloader in windows to boot Mandrake