it is a complex problem i've faced nowadays listen:

1.it's a eee pc netbook which had ubuntu 12.04,backtrack4 and windows 7 installed on it.

2. i wanted to install windows xp instead of 7, so i used a win xp cd and first deleted win 7 partition and then installed win xp instead.

3.then grub gone!! and when i used ubuntu live cd to restore grub but i faced a problem and unfortunately all boot loaders gone.

4.using gparted within that live cd i saw that my home ext4 partition has gone too!!!( it was so important for me).

5.i used hiren's boot cd(testdisk utility) and fortunately my home partition were there.

now... how i can do all these problems i faced??
reinstalling grub,restoring my home partition which is so important for me, having a dual boot system again.

i have no direct access to internet so plz help me do these problems offline.
mer30

if you want to have a dual boot linux/windows machine you need to install windows first and then install linux as the windows bootloader doesn't recognise linux

http://www.gnu.org/software/grub/man...2dinstall.html this should sort you out

also your ext4 partition might not be gone, I would trust fdisk over gparted.. open a terminal and type
fdisk -l
this lists your disks and partitions + filesystems etc
is your windows xp partition the same size as the windows 7 partition you had?