What is exactly the problem with the rocks? The placement and esthetics of it? Please be assured that your fish will not care one bit how it looks, and if you just pile rocks around the tank they will be happy.
They will need some caves and some open areas to spit sand around. If you can stack the rocks in a very stable manner try to get at least one area almost to the surface of the water, as it will encourage them to use more of the upper areas of the tank. I tend to scape my tanks somewhat into thirds, with a left, middle and right area, so for a rocky tank it turns it into "grottoes." Stack the rocks in a "W" shape, with the arms pointing towards you away from the back of the tank, so that you have kindof a "U" shape on the left with rocks in the middle of the tank, and a "U" shape on the right.
You can look through my gallery in my sig and look in the gallery here under Members FW
Tanks to see how people have their tanks set up and to get ideas.