Sorry to hijack this thread. There is really no right or wrong answer when it comes to setting up a low tech tank. There are some fundamentals, but otherwise peoples' differing setups have proven equally successful. There is more than one way to setting up a low tech tank with the types of plants you identified. Based on what I know now, I would recommend that you stick to a low tech approach and forget about DIY c02 or even pressurized c02. Go with Excel for your carbon source and choose one of these two methods. Personally, I would go with Tom Barr's method but Vicky's should work well also.
Tom Barr's method: