In order to get endless lives in this game, use the DOS utility DEBUG.
First make a backup copy of the file that you will be changing. Then type the following in dos:
ren e: \ apb.exe cheater.cht
debug e: \ cheater.cht
infinite lives: e 14fe 90 90 90 90
stop timer: e 725 90 90 90 90 90
infinite health: e 72a 90 90 90 90 90
Then rename the file CHEATER.CHT back to the original name.