The basic philosophy of LIGOtools is to make all executable programs available in a single bin directory, all user-linkable libraries in a single lib directory with all the include files in a single include directory, all Matlab scripts in a single matlab directory, etc. (Actually, the real files are kept with each package, and symbolic links are used to make everything appear to be in a single directory.) Thus, adding the single LIGOtools bin directory to your PATH environment variable gives you access to all current and future LIGOtools programs.
A script called ligotools_update is provided to check for new packages, or new versions of existing packages, and to automatically download and install them, so routine administration should be simple.