Something

title=Windows XP
rootnoverify (hd0,0)
makeactive
chainloader +1

[dj@T41p ~]$ fdisk -l

Disk /dev/hda: 60.0 GB, 60011642880 bytes
255 heads, 63 sectors/track, 7296 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1        4465    35865081    7  HPFS/NTFS
/dev/hda2            4466        4471       48195   83  Linux
/dev/hda3            4472        4595      996030   82  Linux swap / Solaris
/dev/hda4            4596        7296    21695782+  83  Linux