I suspected that it would be difficult to do this, but I know it is not impossible because I did get the old netscape running in the new distribution with a very ugly hack: I ran the old ldconfig just before launching the old netscape program and it linked and executed fine, and then I immediately restored the normal dynamic linking system by rerunning the standard ldconfig program in an xterm that was already open before I ran the old ldconfig. I had to have an xterm already open before running the old ldconfig because xterm would not link after running the old ldconfig.