Welcome to the forums diesy
As far as I know there are no tutorials for this yet.
To have an image file (border at the bottom of the screen) overlay all your screens, you can design a frame and call it Inventory for example.
Then use the Runtime Frames Merging like this:
But I can tell you, that scripting a custom inventory (selecting items in the inventory, and using them with certain hotspots) will be a quite a big work.
I've done that for an HTML game which doesn't support the default inventory of AM, and I have used a similar scripting method for a jigsaw-type puzzle, and I have experienced it as a big challenge. So that whenever possible, I personally will usually stick with the default inventory.
If you have some basic knowledge of VBScript, then you'll be able to do the scripting though. If you need some help to get you started, let me know
