Help on Training an XBE file

[Ace13]

alright, I want to install the Halo trainer and as far as i know, all i have to do is patch the trainer file to the xbe file, I know how to do that, but what if the xbe then refuses to work, then I'll have an xbox with a bad xbe file and no way to put the original back in. Am I just a worry-wart or is there a big risk involved in this?

any help is appreciated, thx