Windows 7 - photoshop extended wont install!!!!

Hello can someone help me out. I own photoshopCS4 extended 64bit. I am running Windows 7 pro 64bit. Every time i try to install photoshop extended it always installs the standard and NOT THE EXTENDED version. I know its not the CD because i tried to install it on my second machine (win xp 32 bit) and it worked!! Does anyone have any suggestions!!

There should be a CS4 64bit icon in your program folder.

The 64 bit Photoshop CS4 is included with the standard version. (That's the version I have, not the Extended version. I have both 32 and 64 bit versions installed. I need the 32 bit version to use the TWAIN drivers for my scanner.)

I have no idea why you might get the standard version under Windows 7 if you have an Extended version license key.

What are you missing from the extended installation? Are you doing a "custom" install and choosing what you want?

Thankyou for your replys

* if filled out the spec sheets

*I tried to install the trail version of photoshop extended on my system (win7pro 64) and it still installs the standard version. It DOES install the EXTENDED on winxp32.

*i turned of the UAC and i also ran the installation as administrator

Still no luck.