When you get to the page of the installation that asks you to choose a product to install, make sure you click the blue PS icon.
At the bottom of this page, hit the "Browse" icon and change the directory from "/Applications" to "/Applications/Adobe".
You should now see the installer initialize correctly without the error message.
Yes, the blue PhotoShop icon.
What else have you already tried?
Ok, you can ignore any automatic phone offers and we can reply back and forth here.
Hi, no payments have gone through to me yet, and the phone offer does not appear to have registered.
If the Mac CS5 cleanup tool did not help, then try using the CC Cleaner Tool:
Ok. What else have you already tried?