Please give more details about what you did. What was the partition layout before, what is the partition layout now and where did you install Linux to?

You can only recover data which has not been overwritten. If you deleted the existing partitions and installed Linux in the same place, then everything is lost. Only if the area on the harddrive where the PFS partitions was has not been touched, there is a chance to recover something.

Especially the beginning of the partition has to be untouched because PFS concentrates all meta data at the first part of the partition.