I've zipped up the OpenZone scene (.SCN) files that I use to build the default files that SimpleClient uses. With these files, you can rebuild the global creature, equipment, and object .XWA files that SimpleClient uses. Included are textures for the global objects and equipment, but not creatures since those are already included with OpenZone and merely exporting will give you those.
The scenes (with object and equipment textures) are here:
http://www.savefile.com/files/1598466
EDIT: I forgot to include the object and weapon .MSH files. I updated the link and included them. Those should be put into your /library/meshes folder.