Two simple questions

[BarkSlayer]

Newbie here with a clean, low mileage '02 Sport. I bought some nice 9007 high output headlamp bulbs and am wondering if there's an easy way to remove the bulbs without pulling the battery and airbox. Space under the access covers is tight. Is there a trick to doing this?

Secondly, how can I change the code in my keyless entry system?

Any help would be greatly appreciated.