If you want to change the hard disk type from split to monolithic, you need to use the command-line vmware-vdiskmanager utility. I'd definitely recommend NOT doing it, however. If you need to perform any disk utilities (shrink, defragment, resizing) you need to have a minimum hard disk free space equal to the max. size of the disk; if a split disk, then you need to have only a little more than 2 GB free. Also, if you have a monolithic sparse disk, there is no separate disk descriptor text file, so if you get any corruption, it is next to impossible to recover.
