Brush Size Increments

Is there any way to adjust the stepping of the brush size? I know Photoshop defaults to 1 pixel increments for brush sizes from 1-10 pixels and then steps in 10 pixel increments thereafter (10, 20, 30,...) until 100, then steps in 25 pixel increments etc... But I would like to know if you can set a brush to increment with the [] keys for a brush of size 16 to 18 pixels. (without having to create a bunch of brushes in the library then use the <> keys, this is a pain)

Thanx

That solves an immediate problem.
Paint Shop Pro, however, will give you a one-pixel brush. I guess CS2 won't, whether you're in brush or in clone mode.
Thanks.