Any way to use 3.5 books for Pathfinder?

[Greenkiper]

I am trying to find a way to use a book from the 3.5 system (Races of the Wild) in the Pathfinder setting. Is there anyway to share information from one system to another?

[Aaron]

Unfortunately, the architecture of Pathfinder is different enough from 3.5 that you'll need to rebuild user content anew for this system.

[RavenX]

Originally Posted by Greenkiper

I am trying to find a way to use a book from the 3.5 system (Races of the Wild) in the Pathfinder setting. Is there anyway to share information from one system to another?

Paizo offers a free Conversion guide from 3.5 to Pathfinder on their website. You'd want to start there. 3.5 books can be added to Pathfinder using the guide as a conversion reference. You would have to add the content from the book through the editor to make it work in hero lab though.