Does that help in LASO tho?
Ah, I got confused since he was talking about saving the checkpoint, so no.
You can delay Halo 2 checkpoints by jumping around though. It's checkpointing system is pretty weird. One time I couldn't even get the game to give me checkpoints for the entirety of Sacred Icon until I save-quit the mission and restarted it completely.
So if you're doing the save-quit method, you can delay checkpoints by jumping around, and if you haven't gotten one a while, reload all your weapons and stay completely still for a bit until it gives you the checkpoint.
And if it does the no checkpoint glitch.. you're just fucked.