When I have had a change to work with the product. I just released Pro 8.1 2 days ago so it will be awhile.
Other than the navigation manager reviewpost works fine with vb
4.2 as noted right here Main Index - Reeftalk Reviews
Now as I work with ReviewPost 6.x series it will gain all the enhancements I have had in Pro and Classifieds but that will be some time to actually do.