Set up the traps on the porch or somewhere near a door to the house or where you will be able to be within about twenty feet of the front of it, give or take. Tie the trap open and feed her in front of it for a few days. Then in the doorway. Then an inch inside. Keep going until she's all the way in the back. As you do that, remember that slow is fast. Take your time. Move at her pace. Usually it takes a week, two tops, to get
Feed a good dry food mixed with canned, so she'll show up and eat quickly. She needs nutrition right now. Get her on a schedule so that she's eating the same time each day. Lock Garfield up at her supper time if needs be, or feed him a little earlier.
Once you get her going that direction, I'll type the rest. It's late here :-). Suffice it to say, it can be done, but females are always much more cautious than males.