I tried to open a post with the support team, but they said that the support for my product was no longer available.
I'll copy the post I posted to the support:
After not using Adobe photoshop elements 4 for a year, i decided to install it again on my new harddrive as my last one crashed. When I
try to install from the CD an error message shows up telling "This installation package could not be opened. Contact the application
vendor to verify that this is a valid Windows installage package". I've tried to install the CD on several computers after that, but I just get the same error message every single time. The CD is not damaged/scratched in any way as it has only been stored on the box it came with.
I am using a legal version of Windows XP and I don't have pirated software that should effect the installation.
Operating System: Windows XP Home
Has it ever worked? If so, what's changed? (provide comments in description field): Yes
Same results with different file?: Not Applicable
Same results with different computer?: Yes
Recent System Hardware or Software change?: No
I'm considering just downloading pirated software instead. I bet I can have less problems and better support if I download it pirated, instead of buying it (AGAIN) for a 100$. It's ridiculous if u ask me.
If you are lucky...
You could try coping the CD contents into your OS clipboard and paste it onto your destop. Run the setup.exe from this desktop folder. It's worth a try although I'm doubtful it's the answer. (Opera shouldn't be a factor...use it myself.)
Could be XP SP2 related maybe have a look at this thread:
or perhaps the windows installer package isn't up to date...see this:
and this goes with the above link...it's to do with Office but note the cause of the error:
None of these things fixed my problem. The thing that got me closest to the solution was this link:
I tried to follow it's descriptions, but I couldn't find a folder in /Windows with the name /Installer (even after I choose to view hidden files in folders).
You certainly whent through allot to help, but none of the solutions fit my problem