Use WinRAR to spilt the file up into 2 pieces, and you'll be golden. Splitting is an option in the compression box. If I have to explain it, then you really need to find a new profession.
@Xdqwerty, Osu! Tatakae! Ouendan! is the Japanese version of the game, different settings/characters/songs but otherwise identical mechanics. I played that before I knew about Elite Beat Agents lol. Both fantastic games https://en.wikipedia.org/wiki/Osu!_Tatakae!_Ouendan