What is the absolute bare minimum I need to run Halo 2?

[pinklink]

Ok, I've already got Halo 2 on my Hard Drive, but I haven't got enough money to upgrade the Hard Drive, so for a while, I have to make do with the space I've got. However, to keep it as free as possible, what files do I absolutely positively need in order for the Halo 2 MULTIPLAYER ONLY to work?

Right now, I've got the following files on the Xbox for Halo 2, please let me know if I can delete any of them.

bink (folder)
- attract_60.bik
- attract1.bik
- credits_60.bik
- intro_60.bik
maps (folder, I'm not gonna list all of them)
media (folder)
- ArialUni.Ttf
- command line.txt
- dlcustom.rdf
- dlcustom.xpr
- dlres.rdf
- dlres.xpr
- Sound.xsb
- Wave.xwb
(no longer in media folder)
dashupdate.xbe
default.xbe
downloader.xbe
update.xbe

I'm mostly concerned about the .bik files, those all take up a lot of space, and deleting them would free up some room on the Hard Drive.

[BlairBitch]

u dont need the bink files

[Juniorman030790]

You can also delete all maps on your xbox that have a number in front of them.

[XD]

Only default.xbe is needed for the xbes.

[a mosquito]

yeah, deleting campaign maps will free up alot of space, though make sure you keep the shared.map, mainmenu.map, etc maps.