Simple... Have the exact same problem...
Step 1. Undo the 2 screws at the front (star driver needed). They will be right at the front on the bonnet, and will look they are are all that is holding the radiator on.
Step 2. Disconnect all the hose clips (3 I believe)
Step 3. Pull the hoses from the current radiator
Step 4. Take the old radiator out.
Step 5. Put the new radiator in, and reverse the above steps.
Ensure the engine is cold/cool to ensure you dont burn yourself, and make sure to have the engine completely off.
Greg, April 2011