Alright, your first step to building a mecha is to get a Japanese blood transfusion, which can be very tricky as a majority of their blood is lighter than air and under extremely high pressure...
Oh, wait, you want instructions? Well, there's most of the Exo-Force line which is slightly less then savory... The best thing about them is the large number of sloped parts and those clicky-hinge things. I'd also suggest that you narrow down exactly what kind of mecha (or mech for the matter) you want to emulate, as there are a great number of sites (see brickcommander.com Brickshelf.com etc.) that cater to a variety of tastes. Above all, you should look at it (the mecha) and ask yourself:
1. WHAT AM I FIGHTING FORRRRRR?
2. Is violence the only way to peace?
3. Do you really want to know what Shining Finger means?
4. Does the Lambda Driver only work when you really need it to?
5. Is your pilot's first response "I'm going to kill you" and second is to self destruct your costly machine?
6. Is it truly a mecha or is it actually an organic creature of questionable origins that will lead to an unsavory conclusion?
7. Is the only time your mecha is remotely useful is when you assemble the five different animal/vehicle like sections together and create a single multi-colored unstoppable justice machine?


