I tried it on the iPAQ 4150.

I did realize my mistake. At the time, I was in a hotel room and I was trying to download and install the software through my WIFi connection. This, of course, did not work.

The Pocket Skype program must first be saved to the computer with which you sync to your PDA. After opening and installing the files on your desktop computer, the PDA application manager will pop up and sync the files to your PDA. Then... Voil?! You are ready to add contacts and talk 'till your heart is content.

Thanks.

-TomS