This is a new level pack for MAME Lode Runner 4, I believe you must extract 
the files into the existing MAME Lode Runner 4 ZIP and then run it.
lrunner.zip   46K Arcade Arcade version of Lode Runner (runs on MAME)
http://entropymine.com/jason/lr/

ftp://ftp.cmpnet.com/pub/filemine/lrunner.zip
