It depends on how you want to go about it and what materials you would want to use. Personally, I'm lazy and tend to just cannibalize them from another case. I suppose if I was forced to build my own I would get some aluminum angle and just drill holes in strips of it and then secure that to the case. And that is definitely not the clearest description in the world, but for now it will have to do.
strangly i understood u lol, good i dead for mounting 1 drive but i would like to have 2 cd drives an 2 HDD's 1 on top the other
Once again, just look at the project log section for a few (many) hours and you'll see many many ways of making a drive bay. One way is taking two pieces of acrylic and drill holes for the drives and bend the acrylic at the top or side or where ever and mount that to the case.
