Windows 7 - Where can I download Windows 7 Pro SP1 32-bit

I have a 64bit key and CD but I want to use 32bit for my laptop with limited memory. I heard the cd-key can be used for either.

Where can I download a copy of Windows 7 Pro SP1 32bit to do a clean install

* Re a clean install...
Read this Tutorial carefully.
Clean Install Windows 7

* Re SP1.
Please run the update readiness tool and then update to SP-1

Ensure you install the correct 64 or 32 bit option for your system)
Download the System Update Readiness Tool (64bit)
Download the System Update Readiness Tool (32bit)

Learn how to install Windows 7 Service Pack 1 (SP1)

There seems to not be an ISO file on that page for what Im looking for
Download: Windows 7 and Windows Server 2008 R2 Service Pack 1 (KB976932) - Microsoft Download Center - Download Details

I just want a Windows 7 Pro 32-bit SP1 ISO

This more to your liking?
http://www.mydigitallife.info/offici...digital-river/

FYI.
Slipstream Windows 7 SP1 into a Installation DVD or ISO File

Windows 7 Professional SP1-U ISO
http://www.mydigitallife.info/offici...digital-river/

If you had purchased Windows 7 Pro Retail, that will always have the 32 bit as well as 64 bit media. That leaves me wondering how you have only the 64bit media. Anyway, that is not my concern. I was just curious.

As long as you have a valid key to activate, you can download it from the above official download from digitalriver and do a clean install.

I dont know if my copy has both 32 and 64 bits. When I burned it, I wrote "64bit" since MSDNAA asked me which one I wanted. So it isnt retail.

Would that copy work for 32bit as well?