Hey fellas, for those interested I found out what happened with my radiator, I've got some pics at home but I'll just describe it.
Basically one of the rubber mounts up top that holds the rad in place has perished, when I accelerated hard the radiator fell backwards, and in to my fan. It's put a nice circular mark in it and tore about a dozen rows away from the top tank. Hence the fact water came gushing out of it!
Now that I'm back in Adelaide I need to go find a replacement, for the rad and rubbers, I'll be doing the ring around today/tomorroe but any suggestions of where to go are most welcome.
And thanks once more IceDuck, your RAA+ really saved my arse (and wallet), you're a top guy and I hope to see you round at more meets.