At last, I found a good online tutorial for converting Google fonts so they can be converted to ttf, loaded with Main Type and used in Photoshop! Here is link to video: http://www.youtube.com/watch?v=cD8jOLYyaUo
Thank you for the useful technique to acquire some OpenSource fonts in a useful format, but it’s not anything to do with using MainType, so I moved it here.
You can also open WOFF fonts in FontCreator, which will export them to TrueType or OpenType formats, or indeed, back to a new WOFF font after editing it if required.
Stage One Copy the URL to Use the selected font.
Stage Two Copy the URL to download the selected type style.
Stage Three Download the Font and Test it in FontCreator.