You should be able to use Acronis to make an image of the active partition on the HDD, the one with XP on it. If Acronis can see the partition with the reinstall on, it should be able to make an image of that too.
If you select the whole drive to be imaged, Acronis should copy the drive as it is, with both partitions.
You CAN check. If you make the latter image, you should be able to mount it, and see what it is containing. That's not the same as restoring, so will disappear when unmounted, leaving the HDD untouched.