I also use this method...
Design Center
Navigate to the locate where my standard blocks are located
Right click on the folder they live in and click the "Create Tool Palette" options which works very well.
Also, you can group the different tool palettes together.
Right click on the tool palette box, click Customize, in the right hand side of the dialog box, right click and select group.
This allows you to only show what tool palettes you want (so you don't have to show them all).
In my case I have certain blocks grouped together and then other blocks in a different group and so on. This allows the user to only have the tool palettes of that particular ground available so you don't have to have all the palettes on at once. (we would have 50+ tabs to navigate through other wise).
Hope this helps someone.