Seriously man, just save your time and money and just get a modchip.. I was doing the AR/SDLoad thing for a few weeks before it got REALLY annoying and now i'm just going to get a damn chip.. Swapping is a huge pain in the ass after awhile.
Besides, you'll spend at least $30 for an AR and about $45-$50 for a maxdrivepro (on ebay, cause ya can barely find them anywhere else) and by the time you screw with everything else, you could have just bought a chip.