There is a small attempt for me to make a component installation tutorial, because I didn't find one.
Before installing a component or a pack of components, a little theory.
In your Robot Arena 2 main folder, there are two things essential for components: the Components folder (default C:/Program Files/Infogrames/Robot Arena 2/Components/) and the Components.cfz file (default C:/Program Files/Infogrames/Robot Arena 2/Components.cfz).
The first, the database contains all the different components, each one has it's own folder. Normally, these folders contain some coding about components, the GMF file and the skin here. But this is not important here.
The Components.cfz is the file which is used by the game to make components appear in your bot lab. If you add a component into the Components folder (e.g. the database) without modifying the .cfz file, can't be used.
When installing a component, the RAR file contains two things: another updated Components.cfz file and a folder named as the component. For the first part, it's very simple: you just need to move the new .cfz file into your RA2 directory and overwrite the old .cfz file. The game will make a new slot in the component part of the bot lab.
But it's useless without the folder contained in the package. If you launch RA2 with the new Components.cfz file but not the new component, there will be a blank in the bot lab component tab (weapons, mechanics, extras...) corresponding to the new component. Clicking on it will crash the game.
To use the component, and after overwriting your game's Components.cfz, you must move the component-named folder (which is in the RAR package) to the Components folder.
If you add a brand new component, that should be fine. But if you replace an existing component with another "version" of it, this is more tricky :
You should go into the Components folder, select all the sub-folders, and remove the read only mode (right click, go in Properties and untick the "read only" option, at the lower part of the window that just appeared). (You can also remove the read only mode of just the component-named folder you want to replace, but it's pointless, especially if you want to add more components)
Then move the new component-named folder coming from the RAR package to your Components folder, and you must overwrite the old one.
Example: You want to install ACAMS antiballast. This one inserts into the Ballast entry of the Extras tab in the bot lab. It contains another RAR file named Weight. In this "Weight" RAR package, there are a .cfz file and a Components folder, which only contains a Ballast folder)
-Remove the read only mode for all the folders into your Components folder (or simply the ballast folder, located at (default): C:/Program Files/Infogrames/Robot Arena 2/Components/ballast )
-Extract the Antiballast package somewhere.
-Extract the "Weight" package into your RA2 main folder and overwrite. This will overwrite your CFZ file and the ballast file into your Robot Arena 2/Components folder.
-And now, the new component should work. And you could now begin to build superheavyweights.
-Last thing: Read the help .txt file given with the package FIRST.
(Sorry Scrap Daddy, I insulted you. You're nothing of a n00b)