After installing DBLP, you can map up to 20 applications on your Palm, memory card, or DA's (Desk Accessories) to each of the four hard buttons (datebook, contacts, tasks, notepad).

In "Scroll Mode", Holding a hard button down will loop through each of the applications assigned to that button. When you release the button, the selected application or DA will launch.

In "Non scroll Mode", the DBLP launcher pops up and waits for you to select an application from the list, and can optionally automatically launch an application after a specified delay with no keypresses.