Dude, your supposed to add the pepper to season the egg. The egg glues the pepper into place, also fills the holes but helps make the egg taste better :P. These are proven "emergency" measures... egg's and pepper are things that a traveler might have in their RV, or cooler, or can get at a store, or diner a 2 am etc.. I don't recommend driving it "back and forth" to work like this, because it will eventually let you down, plan around this car NOW, and avoid the whole situation of your GF sitting on the road with a BLOWN engine rather than a hole in the cooling system etc.... The only way to find the hole is to see where the coolant is coming out while it's leaking.. This could be dangerous because usually the system isn't flowing until the thermostat is open at opperating temp, so chances are, there's alot of pressure etc.... If you manage to stop the leak's with the leak stoppers, If you have rusty freeze plugs and can see rust trails dripping down the side of your freeze plugs, the added pressure of not having a leak may cause the rusted bit's to blow out even bigger, you might be able to drive around for a while if you never install the radiator cap but you MUST keep an eye on the water level.. Don't use anything but pure distilled water, You might think WTF, after putting in bars leak, the pepper and the egg is bad, but nevermind those, mineralized well/tap water is horrible.