The two liveries are based Airseven's fleet consisting of just 2 737-400 aircrafts. !!This will only work with RG Mod installed and with the -400 model ONLY!!
Do note that some of the screenshots are not showing the final product.
Simply paste the two respective folders inside"\X-Plane 11\Aircraft\X-Aviation\IXEG 737 Classic\liveries".
Make sure when choosing the liveries, that's you choose the -400 model. It's not compatible with -300, -400F or -500.