1. Dirty Disc Errors: Clear Cache, and make sure your font files are not in 100+ folders, like each font in its own folder, this causes dirty disk and invis text errors.
 

2. Damaged Content/ Damaged DLC: Most mappacks have 50 maps included, with that said dlc map slots were taken up, so you get damaged content error messages. The fix for this is simple, either delete your DLC installation via clearing out the halo 2 and halo 2 content folders in Udata/Tdata as well as clearing cache or you can just ignore the message, also make sure you have no corrupted gamesaves, profiles, or gametypes which also cause damaged content error messages.

3. If a modded mappack folder name has (- . , ! @ # $ %) any special symbols please rename the folder as in remove the special symbols as it will cause alot of issues.

4. In any modded mappack, if they come with more than 1 .xbe (1.0 or 1.5 XBE's) be sure to choose which xbe you want to use and rename it to [default.xbe] to avoid game boot up issues that could occur.

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- Ways to clear cache. [Xbox 360], Go to dashboard/settings/storage, hover over your HDD and press Y (Clear System Cache) do this around 3 times.

Also go to HDD or HDD1/Compatibility/Xbox/Cache and delete the bin files in this directory.

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- Ways to clear cache. [Xbox OG], Go to E:/Cache, X:/, Y:/, Z:/ and clear contents of all