I personally keep the mods in a folder called DEFAULT, which is stored in $INIT$. The mod text file should read this for items in such a folder;
Default/ExtendedFutaBreasts.swf
But if it is only in the $INIT$ folder it should just read ExtendedFutaBreasts.swf
after that just adjust the boob slider and the tits will get bigger.
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Now MY problem is the layering of the boobs actually cut into the hair and face.
it needs to be edited to be entirely on either side of the head