Just like ranger says. You should be able to do a search on here and get more details.
I've done this on many bear bows no problem. I usually ran it under hot water in the tub for a minute or two, experiment. Over straighten and then hold it while switching to cold water. May take a couple of tries. Once straight string it and test pull(partial). If tracking right let it strung and for the next couple of days pull on it till you hit full draw. Once it's holding Leave it strung for several weeks to teach it.
Then always use a stringer.
Ron