Try using an imaging program like Powerquest´s Drive Image Pro or Norton Ghost and do a disk to disk image (clone). This copies everything from the 3 gig HDD to the 20 Gig. (Note: PQ Drive image pro will hide destination partition by default so you must go into advanced settings and untick \"hide destination partition\". Then all you have to do is make the 20 Gig the master drive and zapppp....same system,,new larger disk.