Custom buttons on left-hand pane

I need to select files and have a new button that invokes a script (batch file or .exe) that simply concatenates a list of the selections to a file.  Also a button to clear the list, and another to view the currrent list (view the file). 

I can add those to the toolbar.asp carefully, but was wondering if there were any tips on how to proceed.

I have done this on a site that is about to launch.  Would post examples but it all sits at this point behind signup forms that require registration, etc...

I usually just decided which button already did close to what I wanted, copied + renamed the javascript function, and rewrote the javascript to do whatever I needed it to now do.

At the moment we are about to try a flash based nav bar that calls the JS functions when the flash buttons are pressed...  

Let me know if you need help with specifics...

Phil