Here is the next major version release for Google's own Google Earth v5.0
Please note, that this release is for BETA Testing purposes only at the time of this post.
I've ran this release myself, and did not come across any problems whatsoever, but that's not to sat it will run snoothly PC's that have less Hardware Spec then I ran it on,
The file (and only file) you need to run, is called "Google Updater.exe". Tbis then scans your PC for any products releasd by Google invluding Google Chrome, Google Earth etc, and will then Upgrade any old versions of such software if it exists on your PC.
If you have no Google Products installed on your PC, then it will just Allow you to download Version 5.0 of Google Earth, and will probably ask if you'd like to download the latest version of the Google Chrome Browser, although that is optional, and can decline any additional downloads if you so require,
Well, that's all, enjoy the New "Under Water" features View too :D it's well cool :).