How to add new battlemusic

[machinehater]

Hey.
I managed to replace one battleground-song with another by copying it into the folder and rename it.
In my case GMTACTIC4.ogg under Dioxine_XPiratez\user\mods\Piratez\SOUND

It works well, but how can i add some more music titles? The gmtactic goes to 14, when i add a 15 it does not show in the list of playable clips (obviously) .
I searched in all files with notepad, but did not find anything.

Is it possible?
When yes, how?

[Dioxine]

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musics:in Piratez_Resources.rul
There you need to declare additional GMTACTIC, GMGEO and/or GMINTER music, to be able to have more than vanilla settings allow.

[machinehater]

Thank you man!! For the info and the whole thing!