When you make a few brushes i would advice making them black with a white backround so it will show up properly. Make sure its not in color because it wont show up. Like this...
Once you finished making your brushes now use the
marquee tool. With this tool make a square surrounding your brush. Then go to EDIT >> Define Brush >> Save. Then go to EDIT >> Preset Manager. Now click all your brushes in the set (hold down the ctrl button) then Save Set.
Now say Load and click the on the file >>Copy >> Paste to your Desktop. Your icon of the brush set should be on your desktop. Right-click on the icon >> Send to >> Compressed File. Your brush set should be a compressed zipped folder. Now upload into your uploading thingy (FreeWebs users it would be in your building mode "Upload File").
To make the actual downloading part work you put <a href="FOLDERNAME.zip">DOWNLOAD</a>
And there you go! =D