I'm NOT the original creator.(This was made by Jango_Fett) I'm just re-uploading it here, because it got deleted from Nexus. (The only web page I know of, where you could download this.)
This mod takes the campaign levels Coruscant: Operation Knightfall. (Republic vs. Jedi), Naboo: Imperial Diplomacy (Empire vs. Naboo Royal Security), Mustafar: Tying up Loose Ends (Empire vs. Droids) and Kamino: Changing of the Guard (Empire vs. Clones), adds them into Instant Action and turns them into classic Conquest.
This is great