我用的是双硬盘，分别装xp和mandrake,以前都是在bios中设置双引导很不方便（我不想覆盖xp的mbr）.自从找到grub for dos后引导双系统真是太方便了。下载：Grub_for_dos-0.2.0pre12.tar.gz文件，解压后把 grub 和 GRLDR 两个文件拷贝到 c: 盘的根下。在boot.ini中增加一行：c:\GRLDR＝“start grub”.重启后选择此项，它会自动搜索boot/grub/menu.lst文件，以后就像是在linux下一样。压缩包中自带boot/grub/menu.lst文件，可以把它也放在c: 盘的根下，这样就会自动加载。不过要根据自己的情况加以修改。以下是我的menu.lst文件。

# This is a sample menu.lst file. You should make some changes to it.

# Added items for installing GRUB [ which is on your DOS drive C: ] to MBR



color black/cyan yellow/cyan

timeout 60

default 0



title DOS/Win9x/Me/NT/2K/XP on (hd0,0)

root (hd0,0)

chainloader +1



title Mandrake Linux on (hd1,0)

kernel (hd1,0)/vmlinuz root=/dev/hdb2 devfs=mount acpi=ht resume=/dev/hdb3

initrd (hd1,0)/initrd.img



title Red Hat Linux on (hd0,8)

kernel (hd0,8)/boot/vmlinuz root=/dev/hda9



title floppy on (fd0)

root (fd0)

chainloader +1



title DOS/Win9x on (hd1,0) -- Do not use this to start WinMe/2K or later

pause Warning: drive map used. Press any key to start DOS/Win9x on (hd1,0)...

root (hd1,0)

map (hd1) (hd0)

map (hd0) (hd1)

makeactive

chainloader +1



title DOS/Win9x on (hd2,0) -- Do not use this to start WinMe/2K or later

pause Warning: drive map used. Press any key to start DOS/Win9x on (hd2,0) ...

root (hd2,0)

map (hd2) (hd0)

map (hd0) (hd2)

makeactive

chainloader +1



title install GRUB on (hd0,0) to MBR (hd0) and reboot. Password: danger

pause You requested to install GRUB onto MBR. We highly recommend you NOT to do so, basically for two reasons: 1. For some non-MS-compatible boot loaders(in case you might be using), the install is INDEED dangerous and may cause your whole disk(and all your operating systems on it) unaccessible. 2. Even if you are using(in MBR)an MS-compatible boot loader such as LILO and GRUB, you may encounter problems like hard-disk-boot-failure when you move or delete the /boot/grub/stage2 file, or even when disk defragmentation operations are made. Press any key to continue...

pause A password prompt will confirm that you want the operation anyway. Press any key to continue...

password danger

pause This will install GRUB in (hd0,0)/boot/grub/ to MBR. Press any key to begin...

root (hd0,0)

setup (hd0)

pause GRUB install OK! Press any key to reboot your machine...

reboot



title install GRUB on (hd0,1) to MBR (hd0) and reboot. Password: danger

pause You requested to install GRUB onto MBR. We highly recommend you NOT to do so, basically for two reasons: 1. For some non-MS-compatible boot loaders(in case you might be using), the install is INDEED dangerous and may cause your whole disk(and all your operating systems on it) unaccessible. 2. Even if you are using(in MBR)an MS-compatible boot loader such as LILO and GRUB, you may encounter problems like hard-disk-boot-failure when you move or delete the /boot/grub/stage2 file, or even when disk defragmentation operations are made. Press any key to continue...

pause A password prompt will confirm that you want the operation anyway. Press any key to continue...

password danger

pause This will install GRUB in (hd0,1)/boot/grub/ to MBR. Press any key to begin...

root (hd0,1)

setup (hd0)

pause GRUB install OK! Press any key to reboot your machine...

reboot



title install GRUB on (hd0,2) to MBR (hd0) and reboot. Password: danger

pause You requested to install GRUB onto MBR. We highly recommend you NOT to do so, basically for two reasons: 1. For some non-MS-compatible boot loaders(in case you might be using), the install is INDEED dangerous and may cause your whole disk(and all your operating systems on it) unaccessible. 2. Even if you are using(in MBR)an MS-compatible boot loader such as LILO and GRUB, you may encounter problems like hard-disk-boot-failure when you move or delete the /boot/grub/stage2 file, or even when disk defragmentation operations are made. Press any key to continue...

pause A password prompt will confirm that you want the operation anyway. Press any key to continue...

password danger

pause This will install GRUB in (hd0,2)/boot/grub/ to MBR. Press any key to begin...

root (hd0,2)

setup (hd0)

pause GRUB install OK! Pre