Backing up Sims 2 onto a DVD

Hi guys,
I have Sims 2 and want to make a backup, but it's currently on 4 CD's, I'd much rather just back it up onto one DVD. Usually you can do this simply by dragging and dropping all (most.. excluding autorun from them and such) onto one DVD... anywho, with the Sims 2, all the *.cab files (the large files used for all the data), is just one file called compressed.zip, not data1.cab, data2.cab etc.

I once saw a big list somewhere on the net that had a list of games which would explain how to convert them.. I know you can buy Sims 2 DVD so it must be possible.


Thanks

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