Can i import Blender's bump method in Unity trough a script ?ex. based on a single texture(RGB) and a slider that adjust the bumpingnes affected by the light or idk im new in all this, because bumped shaders dont work on my computer. A script example would be very helpful or how to do it .
Sounds like you are trying to use an internal shader from Blender. Bump Mapping in Unity is accomplished using the Bumped Diffuse shader where you then specify a Normal Map for the Bumpmap texture slot. Normal maps can be created using the Nvidia plugin for photoshop, or using Unity's built in Normal map converter which is explained in the first link above.
If you mean to create a custom .shader from the Blender internal shader code,..that is beyond my scope.