Replacing audio & editing menu graphics w/o re-encoding

[JediFonger]

howdy! long, long time AV-enthusiast/HTPC user, first time posting. sorry if i posted in the wrong group, admin/mods please move to whichever one is the most appropriate.

my goal is to replace blu-ray audio with Atmos tracks. for example, i bought and own Gran Turismo 4k package and of course Atmos is only on the 4k disc and blu-ray does NOT have Atmos.

in general, i've been using this process:
http://forum.doom9.net/showthread.php?p=1650887#post1650887

it seems to be fine to keep the menu and you can have the Atmos, but the OCD part of me wants to get a little crazy and try to edit the blu-ray menu so the language/audio will mirror the 4k disc with Atmos option.

i know, i know, it's pretty stupid, just be happy with the movie or use mkv blah blah blah... but i do think a core part of forums like this is to BE that ocd >P.

https://forum.doom9.org/showthread.php?t=152952
^but it appears to require scenarist and etc. tools.

so my question is, is it possible to edit blu-ray language menus WITHOUT those expensive tools? in another words, can this even be achieved w/multiavd/bdrebuild or somn.

i know there's a huge variety of methods retail blu-rays are authored... but in my monkey brain, i just think it's as easy as editing some png in jars folder? is it really that easy? i haven't even attempted because i just want to know if i can do everything with just free open source tools.:D

[taurusus]

If this blueray is in java and all the buttons are written in png, then you can replace the original button with your own in photoshop, the main thing is not to exceed the size of the original button.

[JediFonger]

without using scenarist?

would gimp work vs. full blown photoshop?

If this blueray is in java and all the buttons are written in png, then you can replace the original button with your own in photoshop, the main thing is not to exceed the size of the original button.

[taurusus]

If all the buttons are written in a png file, then nothing but a graphic editor is needed. I've never used Gimp, so I don't know. You only need to choose a similar font and color.

[JediFonger]

any tips on the igs menus?

If all the buttons are written in a png file, then nothing but a graphic editor is needed. I've never used Gimp, so I don't know. You only need to choose a similar font and color.

[taurusus]

I didn't understand, is this menu in Java or IG? If this is "IGMenu", then you need a Scenarist or "BDedit", but in any case you need Photoshop and a "Scenarist Designer" plugin for it.