Need help with making custom ISO (batch files)

[Juken]

So, I learned that I could use a mod ISO builder to make custom isos with modded files, then I could send them to friends to play the modded iso with friends on netplay. I've made Theytah's custom build into a full iso, but it uses different sounds (some melee sounds for roy, japanese ike voice, non japanese falco, uprising pit voice), and I've played with it on netplay a few times without issues.

To keep things short, I tried I tried to use it for the 78 stage build, but found out that I have to manually edit the iso builder batch file to fit all the extra files. Now I don't know the first thing about batch file editing aside from the fact that I can open it with Notepad++. Anybody with batch file editing skills know the best way that I can edit the batch file to include all the files from any modded version of Project M into an iso?

I saw it pointing to directories and .PAC files in the projectm folder; could I just have one line that just says to make it extract everything from the projectm folder and put it into an iso? Or would I have to manually type out the directory for all 90 stage files and extra skins?

If anyone wishes to check the batch file or maybe even do the editing for me, the download is the first link that I hyperlinked. The batch file is the "ISO_builder 3.0.bat" file.

 

[Y-L]

I'm pretty sure you have to change the line "gct size="xxxxx" but I'm not sure what to replace it to as it does not just use numbers.

 

[Juken]

I'm pretty sure you have to change the line "gct size="xxxxx" but I'm not sure what to replace it to as it does not just use numbers.

Well, the readme of the iso builder I downloaded said this:

It's the total number of bytes the gct file
allocates converted into hex

So

Find the .gct file on you computer, right click on it,
then click on properties, and check the file size
in bytes
Now just google for "# hexadecimal" or search for
"# decimal to hexadecimal"

The file size of it is 49,224 bytes, but on google I'm just getting stuff about color code.

Edit: I've found that the hexadecimal code is "c048," but there's not really any instructions on where to put it :/