Okay, so I found a really good video on how to get Shaders into ANY MineCraft Technic Modpack. Have a look, it isn't my work. I'm just bringing it to you. If you like the video, maybe support the fellow who did the video, go like, subscribe, etc. Hope this helps. Oh and before I forget, it will work for any Modpack, even those which don't use Optifine, but remember to find a suitable texturepack/resourcepack if you like and you may see some visual glitches with AMD video cards as their drivers don't completely handle OpenGL that great (where as they are the best when it comes to DirectX), but you'll be able to use shaders none the less. (optifine fixes all this, btw).
Oh yeah the issue you are most likely to see with the AMD drivers is any magic effects on weapons and the Beacon's light will look like static, until AMD fixes their drivers...also apparently it isn't a problem in new builds of Minecraft after 1.7.10.