creative web design cannot start installation at all

Hi, I just bought the creative suite web design disk.

I put it in my computer, the disk files can be opened, but I can't start installation or find the set-up.exe at all

Is there any way to start installation? My computer requirements are fine and I have 20Gb left on my hard drive.

Photoshop is also installed on this computer, but would this be a problem?

Thank you VERY much!