Replication can be easily done with today's version software.
Let's say, you have /mylsws folder which contain all your lsws binary, config, and php/html files, you can just do this:
Subversion master server : /mylsws
primary webserver : run code update from master on /mylsws every 60 seconds
secondary webserver: run code update from master.....
For svn, just have to run "svn update" every 60 in cron and you have a full backup ready to rock-n-roll. I do this for my cluster slaves so that all them will have up to date code within 60 seconds when I change the code on the cvs server.
Replication of code/files is such a beast I say leave it to the specialty versioning softwares. =)