Forget the cd ...chuck it out the window.
Go here:-http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?product=3418707&lc=en&cc=us&dlc=en&submit.y=5&submit.x=3&lang=en&cc=us
Click on your operating system and get the newest suite hp have.
If you want the suite for vista then download it saving it to your desktop.
Then if installing it on windows 7 do as i said ...right click the icon and select properties ...compatibility mode....tick the box and choose vista.
When youv`e installed it go here and download the latest photosmart software which is 3.5,save it to your desktop and as before run in compatibility mode...it automatically edits 2.5 and installs 3.5 in the solution...