1. Read, Read, Read, then you will be confused (between every reading).
2. baby steps, along with reading/along with tweecing.
3. learning curve is well straight up and down.
good start would be going to http://tweecer.oplnk, and start reading, also check out stangtuning. com
one of the more user friendly add on programs is the eec analizer.
just take your time/ and be ready to accept the frustration.
keep your cool, I have found the guys on the mesage boards are preaty helpfull with most questions if you have searched and seem somewhat "read" on the topic as to understand what your asking for.
I have seen some say that the PMS is more user friendly.
If I understand correctly you add or subtract a percent value to what you want to change.
In a nutshell ***
Tweecer *** You need to understand how the pcm works cause the
Tweecer itself is just an interface that gives you access
to all of the pcm values for you to change.
PMS *** The goal is to not need as much of an understanding of the pcm
due to their hardware & software design.
There has been a good bit of info on the PMS in past threads on this forum which will explain it much better than I can and I would bet that a search would answer most of your questions.
When I got the Tweecer, tuners like the PMS were not around at that time.
The Tweecer has worked well for me but you have to be the kind of person who can and wants to learn things for the most part on your own. It is kinda interesting to learn how your pcm works and it helps you to undestand why your car behaves so differently after you've installed all of those hot rod parts.