Thanks Baxslash
My Bitmapfont creator is the ideal tool to take a windows ttf font and create a font image and atlas data file.
But if you already have a hand drawn font image (such as those by Scraggle which inspired me to make the Font creator), then you can use my Atlas Image Data Generator app to create the atlas file for any sprite/font sheet* automatically.
Both apps are available through the link in my signiture.
* Images need a uniform background colour and a 1 pixel gap around sub images for auto detect to work.