Before you start, you should make a copy of the folder where the current configuration (if you have one) is stored. If you don't know where it is, search for a file (or files) with a .axe extension. You'll use this later to load the configuration onto the Windows 7 computer.
1) Install the AX4000 software from the original CD. If you have upgraded the version from the CD with a downloaded file, run that upgrade again. 2) Find the executable (AXEditor) on the hard drive (usually Program Files..., Sony..., Nrm..., AX), right click on it and select Properties. 3) On the Compatibility tab, at the bottom, click on the check box for "Run this program as an administrator." If you don't do this, it will complain that it needs to run from an Administrator User Account each time you try to execute it. 4) Insert the original CD into the machine. 5) Plug the remote into a USB port. It will complain that it can't find a driver. 6) Install the USB driver by selecting Control Panel... Hardware and Sound... Device Manager (under Devices and Printers). 7) In Device Manager, an Unknown Device will be displayed. 8) Right click on that device and select Update Driver Software... 9) Select "Browse my computer for driver software" and point it to the CD. 10) It will find and install the driver.
Your AX4000 should now work with Windows 7. To recover the configuration file for the remote, load the folder you saved before starting onto the Windows 7 computer. When you open up the Editor, use File..., Open... to open that .axe configuration file from wherever you loaded it. The Editor will remember that location after that.