Some beginners questions about AVS and Presets

[Ton]

As a complete newbie to AVS, and although I read the FAQ's about it, it is still very confusing for me. I still don't understand well enough what presets are exactly and how you should work with them. Therefore I hope someone can help me. I would like to ask the following specific questions:
1) I downloaded as a start Whacko AVS V, which contains 15 avs files.Besides that, in Winamp there is a folder with Newpicks with over 100 avs files. Do I have to understand it so that all these avs files are presets, so that I now have some 115 "presets" ?
2) Do I have to see it so that every preset is one visual effect, so that I now have some 115 different ones ?
3) When I start the AVS plugin will all these presets, that is in my case the Newpicks AND the Whacko's all be played randomly ?
4) Or do I have to choose or CAN I choose which presets are being used and how do I do that ?
Please help me with this. If there is a guide somewhere where I as a beginner can find this information I would appreciate it very much if someone could give me a link.Many thanks in advance.

Ton