i wonder why every newbie wants to start with safedisc / securom
and they never cracked cd-checks before...
google is your friends in finding 'cracking tutorials' for older games with cd-checks.
learn asm and the win32apis,
get the tools like Softice / IDA / Win32Dasm / HView...
btw, the first game i cracked was Sin (released 1998)
i found a nice tutorial and wanted to try it out... and it worked.