first look at my screenshot:

http://a123.topcities.com/ps-brush.jpg

my problem is that i can't scroll to brushes not visible in that window. i can move the cursor (in the shape of a blue rectangle) off screen (going to the right at the last visible brush) and select & load a brush (offscreen) but i don't know what brush i have selected & loaded until i see it in the main window of photoshop. not very handy :-(
so, how do i scroll in this window? how do i make the window move along with my cursor?

PS: don't advise me to install fewer brushes or to re-arrange or group or re-group my brushes. those are not the answers i'm looking for.