I'm REALLY SORRY!!!
In my updated link the buttons for some reason still did not have the .png extension on them. I was still able to open them with my PSE4, but that's not to say they'll work for everyone. I've made a seperate file for the buttons, and downloaded to check. I also had some of the wonderful ADSD gals help me. They've made sure it downloads correctly and they can open it in PS CS & CS3, PSPX & PSP9. So I'm crossing my fingers. Thank you for your patience with my Newbieness(is that even a word?)
Download Buttons HERE