OK, no worries, that was probably a stupid question I asked about whether or not you had the MT4 platform. You'll want to DL any custom indicators to /Program Files/Metatrader 4/Experts/Indicators...see pic at bottom for the treeview. I'm using Vista so you're location might be a little different with XP or another OS.
Then, once you have done that, open up MT4, go to view/navigator and you'll see the Renko_2ATR there. Right click and attach to chart and you're there.
Here is where the indicators go.
"remember the mayonaise jar...keep cool but don't freeze"