HELP BIG PAPA ! dj full version doesn't work with the crack !

When I apply the crack in the DJ directory, I can't open dj anymore !

I have win98 system, is that the source of the problem ?
If that doesn't work, which software can I use to copy self-booting games ?
I have a cd-writer HP 7200e+ (I'm not sure if it is a multisession writer)

thanks in advance