Be warned that these updates to Morrowind's graphics will tax your computer a lot more than plain MW does. Morrowind is not optimized very well. I have a high-end gaming computer, and graphic-upgraded Morrowind puts more load on my GPU than a heavily modded Oblivion does.
Your laptop was not designed for gaming, so you can expect that there will be limits on how capable it is.
I'd probably say that the mods themselves are not optimized very well. I played Minecraft for around 8 months or so (poorly optimized game to begin with) and messed around with shaders, and even something as simple as DoF would cause you to drop FPS. The mods themselves are not optimized, especially those with shaders (DoF, water shaders, light rays, reflective surfaces).