How to Load the Calculator on Your PDA. To load the application on your PDA, run the Install Application program by: Selecting Start/Programs/Palm Desktop/Install App, or Opening the Palm Desktop software and selecting Install. In the Install dialog box, select Add. Locate the application file on your hard disk and double-click on the file name. Locate the PDA Screen Library on your hard disk and double-click on the file name. Select Done. Select OK.