Since the Windows Phone 7.8 cabs are out and about now, I created a simple little tool to automate the process of downloading and installing the updates to your phone.
This tool will install the official, RTM Windows Phone 7.8 update today, right now. It's easy. Just click Install 7.8, then select the desired language packages. Then wait.
Basically, the tool acts as a wrapper for the UpdateWP file, and contains all the updates and their language packs. Using this tool has the same risk as using the manual cab method, so keep in mind that I'm not responsible for the chance something goes wrong, despite that being very low.
Download it over here. Please do not hotlink, link to this page instead. Thanks. Also, if you have issues with it, feel free to tinker with the source code to find your problem. It's a huge mess, but it should be easy enough to follow and patch if necessary.
If you have issues with about or wallpaper not opening, you have language pack issues. There's info here about that.
If you appreciate my work, feel free to support my efforts ;)
Update! Now supports 8860, the hotfix update. Enjoy! Update again! Now supports 8862, the proclaimed live tile fix!