gtboss:
Unfortunately it is up to each of us to read the regs. Some have different interpretations than others. Call CASA if you are still doubtful after HLs excellent references and explanations. It might well save you a heartache later.
The only way you could get your CPL hours by flying an ultralight is by doing it in another country that does not have the exemptions, such as Czech Republic where a SportStar is on the civil register as they do not have a RAA type organisation and it is a Contracting State. Or maybe South Africa, etc etc.
Arnold E:
To advise someone to ignore the law, especially when their future may well depend on it, is very irresponsible. There is definitely some crap on PPRUNE but there is also gold.
Judge for yourself.