here's a little script to set up a few symlinks in order for id software games to find the required libraries:
ln -is ../../lib/libGL.so.1
ln -is ../../lib/libGLcore.so.1
ln -is ../../lib/libnvidia-tls.so.1
this however doesn't solve the issue which let's all linux 3d apps crash. maybe the freebsd-emulation mailinglist can help to identify the problem.