By the way, it is easier to download the ZIP file of the APK directly on the phone, click through to it using Astro file navigator, open the application management tool and install it directly. That way, you don't need to mess around with downloading to the PC and transferring it onto the memory card of the phone.
This is fantastic! Thanks.
Thanks for the report. I, too, found that my Razr was able to open the zipped file and install from the Files app without any additional messing around.