Well, you dont have an LCD, you have a CRT, so why does it even matter?
As far as mods go, they should be of your own creation. Modding is mostely a process of discovery, unless you are doing it for money. Find the plans for the LCD in question, you can usually find a blow apart illustration of it that will show you where everything goes.
Why dont you just cut a hole in the side that is the correct size, and figure out a way to secure the LCD in there? And is the tower aluminum or steel? Aluminum wont be able to support the weight of an LCD, and stell would still have a very difficult time doing so.