Post 7 in this thread may explain more in detail why there is no official photopost pro to vbgallery import as that is how we have normally determined what importers we have written.
PhotoPost Pro to PhotoPost vBGallery
It is just not a path most companies would move towards since you try to go forward. Writing an importer from our 129.00 to a 59.00 lower featured product is not a fiscally responsible move.