Try and find a service manual for your laptop. Look on Acer's website for one, or do searches on some search engines; could even try calling Acer support to see if they can email you one.
I think Acer's Europe website might have the service manuals. They seem to have every thing else and they are the most up to date.
Any reason why you need to take your Acer Laptop apart. This honestly sounds like you are doing some thing a little more than just a Ram or Hard drive upgrade.