what i want to do is change my squiers bridge pickup for a seymour duncan jb pick is there anywere were it shows or tells you how to do it and do i need to get a new pickgaurd since its a humbucker
The Seymour Duncan web page will have the schematics for the wiring. And yeah you will need to change your pick guard
or you can use a jb. jr instead of a full size one, but from what i've heard they dont sound as great as the full size JB.
You could PM any of the experienced builders on this site and im sure theyd be a big help