Your task is absolutely doable. First, you'd need to create three variables (as I see in your task you have four options to choose from, right?), e.g. as shown in the following mask's screenshot:
and insert the following code in your mask's Icon & Ports tab (icon drawing commands) e.g.:
Image_Opt= get_param(gcb, 'Image_Select');
if strcmp(Image_Opt,'Single Seat')
elseif strcmp(Image_Opt,'Double Seat')
make sure that you have all images, to be displayed in the mask, placed in your current directory. In case, you need, I have attached my 'dummy' subsystem - MASK_play.slx file.