Request L2 Classic 2.0 System Mod

Hello,
I've been searching for days now, but I was not able to find anything.. so here I am.

I would like to modify the l2classic.club client (that is a 2.0 classic client) to show some usefull info (like level and aggro of monsters, and also on screen Spoil Success or Failure)
Any of you knows where can I find a modded system?

If not, can any of you tell me what should I do to mod it? (like sharing at least the L2FileEdit to work on)

Thank you in advance