ORL = Oldrunner Replacement Levels. This consists of levels to replace 
the proprietary ones that come with Oldrunner.

To use them first catch your rabbit: Somehow get Oldrunner installed.

Then replace Oldrunner's copy of original.lvl with this one.

Now run Oldrunner and these levels will be used.

You can redistribute and/or modify these levels, as well as this 
README file, under the terms of the GNU General Public License as 
published by the Free Software Foundation, either version 3 of the 
License, or (at your option) any later version.

The levels are distributed in the hope that they will be useful, but 
WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
General Public License for more details.

You should have received a copy of the GNU General Public License 
along with these levels. If not, see <http://www.gnu.org/licenses/>.