use xcc mixer to browse in ra2.mix => local. mix, when you find the INIs, right click on each one of them and click on 'etract', a windows will pop-up and telling you the destination directory in which you want to save your files in, if you want to know what are these ini files, here they are:
- rules.ini => the game's code.
- art.ini => the game's art
- ai.ini => the game's AI (the file that controls the tactics that computer opponents use).
- credits.ini => the credits file, modifying this file will change the 'credits' text of ra2...when you press the credits button.
- mpmodes.ini => controls the battle modes of the game (if you want further explanation ill be happy to do so

)
- mpxxx.ini => 'xxx' heare means anyword (e.g. mpbattle.ini, mpmeat.ini)
- theme.ini => the file that controls the 'musical themes' of RA2 (their order, are they available in the list or not).
hope my information satisfied you modding needs

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