The partition types listed for partitions 1 & 2 or not normal at all. Need more info.
Do you have a third party program loaded into the MBR ? ie: boot/partition manager , (DDO) disk drive overlay, Nortons GoBack program or any similar program ?

The start and stop adddress of partitions are also totally wrong.

When you ran gpart , did you write the partiton data to the hdd ?
Try to run TESTDISK , (on some Knoppix's cd's it will not run and gives an error doing loading).

What was the last things you did in XP , leading to the problem ?
Size of hdd ? Make/Model of comp ?