Hi! I wonder if there is a way to check whether a png exists in Mods\Data\*.zip

I wish to get the reuslt of this as it is important to BA:B settings backgruonds. BA:B must be used only when the background exists.
Curretnly, in order to acheve this purpose, I use FU(FileExists) and unzip all png from zip, check if png exists then decide whether to proceed with BA. This could work, although using loose png files is not very ideal.