I installed this template and used Ctrl-F5 as stated in the Welcome Page (Read Me) to install the sample accelerator. However, I was a little confused by the rest of the Welcome Page text which talks about using Yahoo Pipes. Nevertheless I was able to create my own accelerator for Visual Studio Gallery like this:
1. Modifying the Accelerator.xml. I found "Creating a custom accelerator for Internet Explorer" to help me out: http://blogs.msdn.com/sudeepg/archive/2009/02/22/creating-a-custom-accelerator-for-internet-explorer-8.aspx.
2. Modified the presentation in Default.aspx to present the button for installing my accelerator, and
3. Debug my project and install my accelerator using the button.
4. Publish my project to Internet Information Server on Windows Server 2008 R2. From there I could share it with my colleagues internally.
I tried to use the Yahoo Pipes method to get a better preview for my Visual Studio Gallery Extension, but it wouldn't work for me because I needed to feed in a custom URL and scrape from that - but Yahoo Pipes doesn't appear to allow me to input a custom URL.
You might want to modify the Welcome Page to capture some of this information.
Great template!