Vista x64 error message

I was doing converting a theme for an old page I had made, to wordpress. The theme had been made by a designer friend of mine. When he was done did he send me both jpg versions and psd version. I just used the jpg files since they where made for my page layout, and everything was fine. However now that I am converting the page to wordpress, did I need to do a bit of resizing. So I go to the adobe site to download the trial version of Adobe Photoshop CS4, install it, and start changing on the psd file. After a few seconds did it hang up, and i get the error message. I try angain several times, but I end up trying to save each layer as png files (to preserve transparentsy) as quick as I can, before it crashes.

But still the issue is that I have some png files that I need to resize and tweak. So I download gimp, and started trying to do some editing in it. And what a train wrack gimp is. There are nonsensical icons and, large boxes filled with them. They really have to do something about ui! But luckily was I able to get done with all editing that required transparentsy, and then I did the final cutting in trusty paint. But seriously gimp programmers! Go grab a few ideas about ui design in CS3,CS4 and Microsoft Paint. A quick tip from me is also to look at; how the tools work in paint, and how layers become inactive when they not are in use in photoshop.

Note: the issue with photoshop is most likely caused by my computer, but it seems weird anyways. I have had a trial of CS3 running fine under Vista x64 previously.