NEWGAME 0;700 10 1000 0 0 2 1000 0 0 classic 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0.000000 0.000000 -30.000000 0 0 0
That's the NEWGAME line of Lexx's replay with the number signaled that you need to change to make it 1 player. (1,2,3,4 is the number of players there, even though 3 and 4 don't work on these latest versions)