Nowadays, one doesn't. If you don't already have the necessary tools, there's no way to get them because of bad practices on the toolmakers' part. Unless the folks in Oregon get their servers running again, nobody can install CSLU, which is the only thing that will generate phoneme data that LipSynchEditor can read to generate .lip files for KOTOR. We could, in theory, find another tool to generate the phonemes. I've looked through LipSynchEditor's source scripts and I'm pretty sure if I had phonemes from another source as a text file, I could write a program to convert it from that format to CSLU's so LipSynchEditor would read it. Or, I'm sure, one of the many better programmers on this site could come up with a similar solution. If we had another tool. I've looked, and other people have looked, and it seems CSLU's might be the only one around that works and doesn't cost money. Although right now it doesn't matter how much you money you have if you don't already CSLU installed. You can't install the program unless their servers are running, and you can't copy an installation from one computer to another because the program checks hardware IDs and will refuse to run. Even though it's a free program.
Currently, the only way to generate lips is to convince someone who already has CSLU to make them. Though, it would be possible to do most of the work even if you don't have CSLU - most of the work is writing text files - and just have someone who has CSLU batch convert them and send over the files.