Thanx Boki,

Sorry for the trouble, I want to replace the one from my first post for a .bmp image from my own.
Or is that not possible ?

In iGO_Gift > ux > the_skin_by_pongo.zip > ui_nextgen > res > the_dark > in all dpi folders there is a loading.bmp but that's a " iGO primo skin nextgen by pongo " bmp

Spoiler: loading.bmp
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So not the one in my first post.

In iGO_Gift > ux > the_skin_by_pongo.zip > ux > the_skin_by_pongo there are no bmp files.