You know how your hard drive is divided into partitions (usually a main one for your OS and then another one for other crap)? Is it possible to undo a partition, and if so, how would one go about do so?
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[20:15] Irysa: I hate myself [20:15] Irysa: I made myself some curry [20:15] Irysa: and then [20:15] Irysa: I realised [20:15] Irysa: I wasn't hungry
I think the merge/divide functionality is what you're looking for.
To the best of my knowledge there is free software that will let you clone your drive, but I don't think there is one that has the split/merge functionality you are looking for. Best of luck.