hi..in my machine i have installed xp and ubuntu 9.10....xp is installed in drive d instead of drive c which has bad sectors..but when ubuntu is installing it takes xp bootloader in drive c ...how can i change it from dirve c to drive d...

besides these...ubuntu grub boot loader starts normally...but the booting screen is totally blank..but when i restart my machine and starts xp ..and then restart it again with ubuntu the screen appears...how to solve it kindly help me

First, note that "Drive C" and "Drive D" are Windows terms for partitions. In Linux, you'll see something like sda1 (the first partition on the first drive).

Please clarify the current configuration: It sounds like Linux is on the first partition and Windows is on the second. Also, can you always boot into Windows?

(You can see your configuration by booting from the Linux CD---open a terminal and enter "sudo fdisk -l". Post the results here.)

Note that boot code must be in the MBR of the drive---Assuming you only have one physical drive, then it must go there---not in "drive C" or "drvie D" which are really partitions.