Try moving the customization template outside of the choice brackets. The portal gets really weird when you place labels inside of a choice. So make your script look like this:
} “MENU-CUSTOMIZE” {
sound button_click
@transition fade out black in 1.5
goto femlcc_custom_0_BEFORE
}
(finish off you choice selection)
label femlcc_custom_0_BEFORE (to set up the background n stuff)
EXT. FLOWERGRIEFER RAINBOW BG
@pause for 0
label femlcc_cusom_0
(customization here)