I did mine.. (haha this is my topic.!!)
I bought a dual alloy radiator of SAU group by... cant remember how much.. roughly 400 from memory.
I did replace my hoses... these can be sourced from the sponsors on SAU. They are approx $70 + postage. The reason why i changed my hoses was because it was only an extra 70$ and then i know they are new. =)
Flushing the engine is important not just the radiator. When you replace your radiator, once the old one is out, simply pull off the heater hose, and put a garden hose up it, and flush out all that old stuff.
Bolt in the new radiator/hoses. And fill her up with the new coolant ~ 8litres (buy 10 to be safe)
Dont forget to bleed the system, Dont worry too much about this.. as long as you get a decent amount in there, it wil bleed it self out over the next few days... just keep topping up the overflow bottle until it has stablised... as it well keep going down as the air lets it self out and sucks in more coolant.
Overall took me about a day to do it. Started roughly 10am finshed 5pm... but thats me mucking around... taking my time and having a few drinks.
so the things i did
1)changed radiator
2)Changed hoses
3)Full engine coolant flush
4)replaced coolant with Techloy 100 (around 8 litres from memory)
Hope this helps! =D
Here a pic of my "smick" engine bay with alloy radiator =)