As title really, just cant get my head around this?

I have dosbox installed on my N900 - I understand the fact i have to mount a drive, but not sure where, how if or what. I have my original cannon fodder CD here and would love to know - in leymans terms on how to get it to play.

Please someone help - I have spent probably 3 hours looking through the dosbox posts, but most just have little conf problems, I cant even get that far.

Help.

Paul