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I've done three oil changes myself now, and found it to be fairly easy. A few comments: 1. There is only one splash shield to remove on a 400h. 2. Changing from the top or bottom is somewhat a matter of preference to me at this point. I have tried both. I find the mismatched fasteners on the splash shield to be annoying so I will probably continue to access the filter from the top from now on. 3. R&Ring the oil filter is much easier if you use a brand of filter that is compatible with a spanner type oil filter wrench. 4. The oil channel thing works pretty darn well--GM would never have spent the extra buck to add one to any of its vehicles. 5. Any typical drain pan catches the oil filter drip-down and a little wiping with a rag from both top and bottom cleans things up pretty well. Thjere is a bit of a well at the back corner of the drain chanel which holds a bit of oil. If you don't get it wipes fairly clean it will probably contribute to future oil spray around the engine from windage. 6. I would not do this with a warm engine. It ain't necessary and it's just harder. 7. It is easy to overflow oil down the engine when refilling if your funnel or extension tube gets too close to the internal baffle. Pour slowly and watch for overflow. Don't ask me how I know. Tom

You shouldn't have a problem finding those seals because most stores will carry the front crankshaft seal and camshaft seals. It would be easier to remove the crankshaft pulley bolt if you're able to lock the crankshaft in place but it's not neccessary, though. The only time you should really worry about moving the crankshaft is when you have relieved the tension on the timing belt but even then, the engine in your car is a "non-interfence" engine.