grub doesnt load my windows partition

Dear ,
         This is with regarding dual boot windows and ubuntu . I was using ubuntu 8.04 and recently I loaded windows XP 64 on my second hard disk .Below is my fdisk -l output for your reference

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xc607ac59

   Device Boot Start End Blocks Id System
/dev/sda1 * 2 3652 29326657+ f W95 Ext'd (LBA)
/dev/sda2 3653 11497 63011840 7 HPFS/NTFS
Partition 2 does not end on cylinder boundary.
/dev/sda3 11497 19458 63941632 7 HPFS/NTFS
Partition 3 does not end on cylinder boundary.
/dev/sda5 2 3652 29326626 7 HPFS/NTFS

Disk /dev/sdb: 80.0 GB, 80060424192 bytes
255 heads, 63 sectors/track, 9733 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xf9d2f9d2

   Device Boot Start End Blocks Id System
/dev/sdb1 1 1743 14000616 83 Linux
/dev/sdb2 1744 1867 996030 82 Linux swap / Solaris
/dev/sdb3 1868 5602 30001387+ f W95 Ext'd (LBA)
/dev/sdb4 * 5603 9733 33182257+ 7 HPFS/NTFS
/dev/sdb5 1868 5602 30001356 83 Linux

Disk /dev/sdc: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xe90ded1a

   Device Boot Start End Blocks Id System
/dev/sdc1 2 4865 39070080 f W95 Ext'd (LBA)
/dev/sdc5 2 4865 39069744 7 HPFS/NTFS

My windows partition is on sda2 and ubuntu on sdb1. The MBR is on sda1. The boot .ini file for windows is on sdb4 , where there was a previous windows installation . Its the C drive in windows .Hope I didnt confuse you . I will attach my menu.lst entry below

default 0
timeout 10
color light-cyan/light-gray white/black

title Chainload into GRUB 2
root (hd1,0)
kernel /boot/grub/core.img
savedefault

title Debian GNU/Linux, kernel 2.6.24-19-generic
root (hd1,0)
kernel /boot/vmlinuz-2.6.24-19-generic root=UUID=ffb47c62-5d01-44ca-b2ec-23df0773d8f8 ro quiet splash
initrd /boot/initrd.img-2.6.24-19-generic
savedefault

title Debian GNU/Linux, kernel 2.6.24-19-generic (recovery mode)
root (hd1,0)
kernel /boot/vmlinuz-2.6.24-19-generic root=UUID=ffb47c62-5d01-44ca-b2ec-23df0773d8f8 ro single
initrd /boot/initrd.img-2.6.24-19-generic
savedefault

title Debian GNU/Linux, kernel 2.6.24-18-generic
root (hd1,0)
kernel /boot/vmlinuz-2.6.24-18-generic root=UUID=ffb47c62-5d01-44ca-b2ec-23df0773d8f8 ro quiet splash
initrd /boot/initrd.img-2.6.24-18-generic
savedefault

title Debian GNU/Linux, kernel 2.6.24-18-generic (recovery mode)
root (hd1,0)
kernel /boot/vmlinuz-2.6.24-18-generic root=UUID=ffb47c62-5d01-44ca-b2ec-23df0773d8f8 ro single
initrd /boot/initrd.img-2.6.24-18-generic
savedefault

title Debian GNU/Linux, kernel 2.6.24-16-generic
root (hd1,0)
kernel /boot/vmlinuz-2.6.24-16-generic root=UUID=ffb47c62-5d01-44ca-b2ec-23df0773d8f8 ro quiet splash
initrd /boot/initrd.img-2.6.24-16-generic
savedefault

title Debian GNU/Linux, kernel 2.6.24-16-generic (recovery mode)
root (hd1,0)
kernel /boot/vmlinuz-2.6.24-16-generic root=UUID=ffb47c62-5d01-44ca-b2ec-23df0773d8f8 ro single
initrd /boot/initrd.img-2.6.24-16-generic
savedefault

title Debian GNU/Linux, kernel memtest86+
root
kernel /boot/memtest86+.bin

title Microsoft Windows XP
root (hd1,3)
chainloader +1
savedefault
makeactive

           What changes should I make to the last few lines so that I could boot into my windows . Also I am using grub2 . what are the advantages compared to grub .

Thanking you
Achapp