Installing Webmethods 8.0 on Windows 7 ( 64 Bit )

I’m trying to install Webmethods 8.0 using the installer SoftwareAGInstaller80SP2.jar. In the wizard when I enter the image I get the following error :

The installation image C:\windows_webm81_developer.zip is a Microsoft Windows 32 bit image. To install on this system, you must use a Microsoft Windows 64 bit image.

I have installed both Java 6 update 18 64 Bit C:\Program Files\Java\jdk1.6.0_18 and
Java 6 Update 17 32 Bit C:\Program Files (x86)\Java\jre6. Path only has the 32 bit path.

Does anybody know how I can point to 32 Bit JVM for the install? Any other suggestion would be helpful.

Thanks, Fernando

You really need a 64 Bit Image right?