Place files in \jre\lib\ext

Java3D (j3d*.jar, vecmath.jar)
http://java.sun.com/products/java-media/3D/

VRML Loader (vrml97.jar)
http://www.web3d.org/WorkingGroups/vrml-java3d/

Recordable Canvas (portfolio.jar)
http://www.ncsa.uiuc.edu/~srp/Java3D/portfolio/