Feature Request: Auto-execute option in SPUMUX

I'm currently using DVDStyler and one feature lacking is a true 
auto-execute button (execute upon select, typically for hidden buttons) 
that I typically use for scrolling multi-page chapter menus and it 
appears SPUMUX would need to support this for DVDStyler to use it. I've 
tried some suggested alternative methods within DVDStyler, but they 
require timing out the menu on a regular basis that momentarily lock out 
the user as the display refreshes. I found PGC Edit that gets me what I 
want, but I do have to generate the DVD files on hard disk, go into PGC 
Edit to set the auto-execute buttons and then burn to DVD. Obviously it 
would be nicer if I could do this directly in SPUMUX via DVDStyler.

For reference, see the Auto-Action flag in BTN_IT Button Information 
Table at
http://www.mpucoder.com/DVD/pci_pkt.html#btn_it

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