I would like to change the server write name post install from nobody:nobody to myuser:users. Is there an easy way to do that post install? i.e. so I don't have to go through the install script again?
You can give it a try, permissions of some files under lsws/ directory need to be changed as well, after changing it, you need to do a manual upgrade from command line, it should fix those permissions.
If you messed up, just do a reinstall.