So I downloaded the
breastexpasnionplus mod but when I want to load it in it says "breastexpansionv3_2 done with loading" but nothing happens.
Nothing is supposed to happen right away. The mod's noticable effects begin when semen is swallowed. Please note that a significant
quantity is involved; the girl's belly
won't swell to maximum size because of a single ejaculation. There's also a negative feedback cycle; the mod will attempt to gradually reduce the growth effect via puke, drool, etc. If you're playing very cautiously then you might not notice any growth at all.
If you'd like to tweak the mod's configuration then please take a look at its settings file. You can, for example, increase the mod's responsiveness so that growth effects will begin more quickly (and/or so that shrink effects will be greatly reduced). You can also setup hotkeys to manually adjust the expasion amount.
It's generally a good idea to read the settings file after downloading a SDT mod, especially if the mod doesn't seem to be working correctly. sby's mods often contain optional or experimental sub-features; some of them must be manually activated by altering the settings file.