So in 0.3 Alpha, I didn't include the peeking yet, it'll be on beta test ;]
As for the mod, make sure it shows on the mod tab on the option menu
then once you finished the whole alpha story, there'll be a wardrobe button, you can click that to add and remove the clothing pack in the wardrobe
(keep in mind that is still experimental, it might cause another error and bugs, Thank you for trying the game! ^^)