My recommendation, and the recommendation from UK Dirt , who modify it into BriSCA Heat for use in their league, is to contact Dave at Oval Racing News; dave@ovalracingnews.com If you buy this way you will probably also get an additional CD with various BriSCA Heat mods and UK tracks, which can be used standalone or online with UK Dirt, if you are interested. It was a while back when I got mine, so check what you get. There are allsorts of downloads available for BriSCA F1, F2, Saloon Stox, Bangers, National Hot Rods etc http://www.ukdirt.co.uk/ Hope this helps. (This is where I got my copy).
