Well It is never completely safe to play online. What type of drive ? (liteon, benq, etc.?) You will need jungleflasher to start with. That comes with a step by step interactive tutorial which is very very helpful. You are on the right track as you have pretty much all you should need. I recommend flashing your drive back to stock firmware, updating your xbox to the latest dashboard, then re-flashing the drive to the new LT 2.0.