Create product images collection from existing product images

I have about 10 to 20 product photos which need to be merged into group photos of product solutions, an example of that (not ours called [login to view URL]) is attached. As with the image attached you can see there are several photos presented as if they are all sitting in front of you together. That's it. We have created examples ( [login to view URL]) but they are not professional enough, were just created during web design for placement but now need them to be professionally designed. There are about 12 main montages (if that's the right word) and then several sub ones on each which are adjustments of the main one, ie. 6 parts in one and 5 in the next,or the exact same. There is a folder of photographs and nearly all are without background already to be cut and paste. This is really a creative piece and the final look is important.