This doc contains a relatively easy route to perform the arbitrary code execution glitch and warp to the credits. The route reduces risk as much as possible, and gives some advice for how to correct for execution errors. It also contains some information to help you verify that you're doing everything correctly.

https://docs.google.com/document/d/1EbO7-CfophQFAHBsn2hDod6KXKfie5uh_cybcS1JZhA/edit?usp=sharing