I don't know about XXXX but CUB lagers use the Fosters B strain which is fairly similar to Wyeast Danish. A certain member here who works at CUB but will remain nameless reveals that to use this yeast you start at around 13 then let it rise to around 19 over a few days, then lager for 10 days. On the odd occasion that I do an Aussie it turns out very much like the pub version, but I need to use 30% sugar by gravity.