hey 
I am not sure of the "correct" way but can tell you how I did it
to start with we made up all meals using some formula and based around baby rice. I did warm the formula before mixing with baby rice and got it to the correct consistency through trial and error. We then gradually introduced different flavours like carrot and banana wtih the baby rice before reducing the rice and increasing the other ingrediants. does that make sense? what formula was left we then offered her from the bottle and some days she would have the lot, others hardly any. I did start early but now she is six months she is having:
Breakfast - Porridge made with formula and then the remainder, she then often has some toast [oink oink]
lunch - veg puree and a banana
Mid afternoon - 6 oz formula
Dinner - a puree of what ever I have made for us for dinner and a yogurt
8pm - 6 oz bottle
Molly has never been a huge milk drinker and likes her food, she is also on thickened formula for reflux and we have found weaning has helped the reflux to the extent her medication has stopped 
Sorry if I have waffled 
Mum to
Molly born 16th September 2009 weighing 8lbs 6oz
Mum to my beautiful step-daughter Lauren born in 1998