Need a tutorial on Installing windows 7 on an HP TX2



I have an HP touchsmart TX2 currently running on windows XP (took a long time to change). It came with Vista, but i changed it to XP. Now, i am thinking about changing to windows 7, but there are some things i am worried about. First, i know how to install windows 7, but i just need a tutorial/guide as detailed as possible because i don't want to mess up like i did with XP a long time ago. Secondly, i need to know how to enable multi touch and make sure all my hardware (bluetooth, keyboard etc) will work. And lastly, i want to have a totally clean hard drive after i install it, which means i do not want to keep anything from my XP.

Thank you in advance.