FastLaunch for Treo/ Centro has been updated to v1.55- "Quickly dial contacts, launch applications and desk accessories, including popping up one application over another, while keeping the old one loaded."

Fast and simple launcher for Treo/Centro phones.
Quickly launch an application (or Desk Accessory) just by holding down the first letter, which gives you a list of all the applications starting with that letter. You can also dial a contact starting with a given letter by pressing the navigation-right key from the list of applications.
Pop up an application on top of another application by pressing Option and then holding down the first letter. After the popped up application is finished, you can return to exactly where you were in the original. Normally PalmOS only allows one application to run at once. (Not compatible with all application pairs.)
Tap on-screen buttons in some applications just by pressing the first letter of the button.
No need for a complicated configuration--just install and turn on to use.
Free updates for the life of the product.
Includes four free Desk Accessories that you can use with FastLaunch and other Desk Accessory launchers: PrintIt (print screen to compatible tcp/ip network printer), ScreenDumpDA (save screenshot to SD card), NightMode and Reset.