EXEs were compiled to run with the Windows operating system and (typically) an Intel processor; neither of which are compatible with a Palm device. You can only install programs specifically designed for a Palm. In fact, because the Palm operating system and processor have evolved over the years, there are many programs written for older Palms that will no longer execute properly in newer Palms (and vice versa). You'll find this is also true of Pocket PCs even though they have a Windows-like operating system.