im a bit of a n00b to linux and am trying to grasp how to get hardware setup on a number of test machines I have (1 laptop, 2 desktops). I've been browsing around the internet trying to better understand how to get hardware working on computers that have hardware issues.

My basic question is when do I have to build a custom kernel to make hardware supported (or do i even have to)? Is it better than just adding drivers on when needed?

Why would I want to build a custom kernel?

If this seems like im incredibly confused, i appologize

Thanks,

Welcome to LQ.
My suggestion is just to choose a distribution (I like Mandriva 2005LE for beginners - but others will differ). Most hardware is supported the "out of the box" kernel is very good, if not you can search for other peoples' solutions (google and this site).
Try installing linux one one of your desktops as they are generally better supported than laptops.
Use with it and see what you think. Kernel recomplies are not that common with me, but you may want to play with it.
Have fun.