It appears your browser does not yet support the OpenSearch plugin format. Not to worry. We have a few suggestions to help you out. If you are using Safari on Mac OS X, simply go through the following steps and you will be all set.
To add a custom search engine in Safari on OS X, you will need to install the popular search plugin, Inquisitor. In case you haven't heard of it, think of the way Spotlight works in Mac OS X. You type in the beginnings of a phrase, and Inquisitor offers suggestions of potential search terms. We use it here at Viewzi and think it is one of the cooler browser plugins out there. Incidentally, so does Yahoo, because they acquired Inquisitor in May of 2008. This is how you add Viewzi to Safari via Inquisitor.
Go to http://www.inquisitorx.com/safari/ click the "Download" button.
After the download completes, migrate where the file is saved. This will most likely be your Desktop or Downloads folder. The easiest way to get there is to click the little magnifying glass icon in the Download window. Double-click the Zip file, which will most likely be named InquisitorX.X...zip, where the X's stand for the current version number.
After opening the Zip file, there will be an installer package file in the same directory. It should look like a cardboard box filled with translucent yellow gelatin cubes inside. Double-click it, and the installer application will begin to run.
After reading through the legalese (You do read those things, don't you?), and verifying your install location (If you're not sure, just leave it as-is), re-launch Safari. You will now see the word "Inquisitor" in the search bar. Just a little further, and you'll be done.
In Safari, open your Preferences window by using the top menu or the keyboard shortcut (⌘,). Click the far-right tab labeled Search, and click the button labeled "Edit Sites..."
In the dialog box that pops up, click the Plus sign (+) and then choose "New custom search shortcut..." This will highlight a new, editable row. Type in Viewzi in the Site Name column. In the URL field, cut and paste the following URL.
Note: The %@ is a variable which represents your potential search term. In the Shortcut column, you can add a custom keyboard command that allows you to quickly make a Viewzi the term in your browser's search field. We suggest using Option-⌘-V, in keeping with the conventions used for sites like Amazon and Flickr. After you've typed all that, click "Done" and now you're ready to start using Viewzi directly from Safari!