Do you mean adding a new page? Simply write a wrong URL (i.e. https://wiki.multitheftauto.com/wiki/MyAwesomeFunction). It will then tell you that the page doesn't exist, but that you can create it. Login with an OpenID account and click on "edit this page". Now you can write whatever you want. Save it, go to the Useful functions page and add your new function there.
You can compile/encrypt your code, but there will always be a way to decompile/decrypt it. The best you can do is use the cache attribute in the 'meta.xml' file (that will load the file, but won't save it on the client's computer).
You can't use transparent AFAIK. Also, you should use pictures with size that is power of 2 (128x128, 256x256, 512x512, 1024x1024, 256x128, 512x256, 512x128, 128x1024, etc.).
You can achieve that changing the vehicle's handling (search wiki for the handling functions). There is also a resource for changing it, but I'm not sure of its name.
Do you mind talking in a single line?
@Mr.Pres[T]ege, you forgot to say that for using getPlayerIP and getPlayerSerial, the resource needs rights to use them.
I came back home some hours ago, but only now I remembered I had to check the code for you. Unfortunately, the code is compiled and I'm too lazy to decompile it so the best you can do is wait someone to tell you or simply contact Tactics' owner, I see he's still working on this (last update has been uploaded 3 days ago).
Ah, ok.. Now I got it. I thought that by "Lua libraries" you meant "modules", Quiz.
By the way, there is a sockets module (there are actually two I think) that you can use. Simply download it from the MTA:SA Wiki and follow the steps I wrote above.
That happens because you trigger an event many times with much data (not really sure about it). It may get solved if you make a delay between each trigger.