First, you need to determine if your client machine that you will be using to connect to Exchange 2007 server is 32-bit or 64-bit.

To download the 32-bit tool, you can go here —

Then go through the normal install as if you are going to install the Exchange 2007 Server — make sure you choose custom install.

Then, uncheck every option except for Exchange Management Tools. This will install Exchange Management Console and Exchange Management Shell.

Good luck!