Please help

Hey alright i have a problem my cd messed up last night when i was trying to get on d2 and i refuse to buy a new one basically so i downloaded the d2loader and well lets just say i am not great at understanding computer talk and stuff so if anyone could give me in lamen terms how to get it to work i would be very thankful....maybe meet me on msn sometime and give me a step by step thing..? i dunno any help would be great because i really dont want to buy a new cd drive and i really dont want to quit ither. So yea holla at me
I dont know what all this program can do but all i want to do is load it without the cd and umm yea