The Online Hebrew Tutorial is just a Word document, that is later converted into a platform independent Adobe Acrobat file.
First, realise the translating the entire tutorial is a large task. It is also an voluntary task to, so you'll need a large reserve of patience and commitment. Because people will learn from the document you output, it needs to be of high quality. Consider doing a smaller task instead.
If you're still not discouraged ;) - mail us for the original word document.