First off, is there such a tool?
What I actually want is some sort of Graphic Disk Partitioning tool that can understand FAT, FAT32, NTFS, EXT2, EXT3, Linux Swap, Solaris 10 (More file systems is better, but those are the main ones I care about), but Solaris 10 only will do (I already have several that support the other partition types I need).
What I mainly want to be able to do is setup partitions BEFORE a install of Solaris 10, and once it is installed, be ably to re-size any Solaris 10 partition, and move the physical location on the disk.
Case in point at the moment - I HAD other partitions on the same drive as Solaris, that I deleted because they were no longer needed, but Solaris 10 is all the way at the end of the disk and a lot of unused space between where the used space at the start of the disk ends, and Solaris starts - so I would like to move Solaris 10 to right after the last partition before all that unused space, so that ALL unused space will be at the end of the drive. Also, I found some Solaris 10 partitions specified during initial install are way to large, others not large enough for the way I am using it, an I see no easy way to change the size of them.

There is no such tool that I am aware.
However, the need for that kind of tool is disappearing with ZFS, with which file-system management is far simpler.
Latest Solaris Express builds allow booting on ZFS, removing the / on ufs previous requirement.