It's called drag & drop. You can save your presets (brushes, custom shapes,
gradients, patterns, etc.) in folders anywhere on your hard drive or on disks, and organize them in whatever fashion suits your needs.
When you want to load them into Photoshop, open the folder, select one or many at once, click(and hold) on the selection and drag onto the photoshop screen, then release the mouse button. Your selection can include any combination of preset types. Photoshop will load each of the presets into its respective palette, and you can get right to work.
Dragging them in like this does NOT remove them from the folders you have saved them in, it simply loads them for use. (Make sure they are not in ZIP format---the zip files must be opened.)
I use this method a lot when I have a nice long downloading session and I'm eager to try out the goodies .

Am currently working in CS2, but I have used this method in CS and 7.
I hope this helps.