Okay.. i´ll rewrite the whole thing..
But stuck in another problem..

I can create a Panel with Panel, and with pan_setbutton, i can create the buttons..

Question:
Is there a way to erase those buttons when RELOADING the files?
I don´t want to erase the models, stats..etc with level_load..
Just the buttons i created with pan_setbutton...
(f.e. pan_erasebutton(PANEL*, number);)

I surely could make pan_setbutton and switch all buttons invisible.. but i need the Button-IDs again when loading the new Models... and writing a second code in an if-condition is senseless ._.