there is a document in the directory .../installdir/doc called LDV Configuration Guide. But as I know you only have to add the library path:
"setenv LD_LIBRARY_PATH install_dir/tools/lib:${LD_LIBRARY_PATH}"
and add the path to the binaries:
"set path = (install_dir/tools/bin $path)"
Special variable set up is necessary for 64bit mode.