partition recovery

80GB hard drive all partition gone, there are actually 3 partitions equally divided. the HD was in windows XP. tried to make a new partition in hopes of installing XP and recovery anythin, but it only made 10mb of spaces altho it says I already have used 78GB or so of my HD. I hope my files are still there. do u have any idea how can i get my files back? or any programs i can use. Im tryin a few softwares ive downloaded