>>2593282>well i dont have my own dslr,You might want to fix that. Any camera that can achieve 1:cropfactor magnification should work.
>also how important is keeping it flat and keeping it backlit?These are the two key points of film scanning. Flat means nothing is going to be out of focus, ideally. It also means you need a lens with a flat field curvature, usually a macro lens. Even, daylight or LED balanced back light is crucial for even exposure of the scan. Some people prefer LED backlights for reasons I forget. Even lighting means diffusion and power. Also control of that power. You will be shooting the film at smaller apertures for sharpness and depth of field, but not so small that diffraction sets in. Around F5.6-F8. That means, you'll need to be able to control your flash power, either by heavy diffusion or adjustable power.
>and then after that theres the editingAh. Well. You can buy ColorPerfect for $70, a photoshop plugin that works more or less flawlessly in generating colour positive images. You can pirate ColorPerfect, if you can find a source. You could attempt to manage the colours yourself by playing with all the curves. You could use Picasa's auto-colour to attempt to correct the colours, but it doesn't always work.
Here, have a potato of a photo for inspiration. Don't take it is as the end all and be all of DIY film scanning setups. I've seen some good (frankly, better) results with simpler setups.