I have looked through the Macromedia site and I don't know if I'm just not using the right "keywords", I mean "Custom scroll" or just "scroll" doesn't show me what I'm looking for. I hope I'm not being too confusing but anyone's help would be greatly appreciated. Thanks!
If you're not too certain about how to code one, a quicker option would just be to take the scrollbar component, and customise how that looks. Of course if you want to learn how to make a scrollbar, then yeah, i agree Flash Kit is a good place to start looking.