How to run games without inserting CD in CD ROM?

helo al friendzz.... i have installed NFS hot prsuit-2. i've successfuly unveiled its feature of running crack file by ur help. now i need to run it without cd rom.i have heard about some "image mounting softwares" which can mount an image of game on an imaginary drive (the software makes this drive in my computer).but how this works properly. please help me solve the problem. God bless u all....... ADNAN

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