The engine blocked? Are you sure you inserted the right value for skill1?
I guess the gun was too big because you inserted a wrong scale-factor, but you already fixed that...
To stop the player from moving, you could insert
freeze_mode = 1;
at the beginning of each inventory-showing-function and
freeze_mode = 0;
at the end.
You can have each item as often in your inventory as you want, so that's no problem
To remove an item from the inventory just use
In Antwort auf:
take_item(a,b);
a=ID
b=Number of objects to remove
in the object-function.
Its hard for me to guess how much help you need, so just ask again if you want more help for the object-functions or other stuff.
Oh, thanks for reporting the mistake in the readme! Sorry for that, I wrote it quick
Anyway, hes right, so be sure to insert a scaling-factor!!!