Nismo rom controls SC in a totally different way. The AUS board for the ST I developed with the company, its not fully tested yet and is missing important functions. Mines rom etc for the ST is not worth it imo.
Ask @Baz mate. I could have sworn he retarded the timing of the mines ones because they like to melt pistons. There is one on ebay for about £400. Dont know if you can remap but if you are that fussed about melting pistons maybe looking into nistune? Could have sworn thats what edd was running.