glad to hear the drop caps are working for you.
for your other images, i recommend you create 2 classes in your css. to one class, you give an attribute of width:100% (or 90%, if you want a little margin) or whatever. to the other you give height:100%. then you apply the classes to the images depending on their specific proportions ; for portrait images you give them a 100% height, and for landscape format you give them a 100% width.