Irrlicht Engine

Here is what I did:
1. Made modifications to irrlicht source w/patch program
2. Opened modified Irrlicht source, recompiled with devc++
3. Copied headers/include files from base source directory and source/include to irrlicht/include folder
4. Copied files from source/DevCpp to irrlicht/Win32-gcc
5 ...

This looks very nice, but when compiling my project after re-compiling irrlicht 1.0 with the updated version, all modifications, OPENGL, static, and devC++, I get this:

[Linker error] undefined reference to [Linker error] undefined reference to `_imp___ZN3irr12createDeviceENS_5video13E_DRIVER ...

Please excuse me as I'm a bit new to Irrlicht. My main talent is art, although I've been into programming/game design as well for quite some time. I was wondering how (or if) it would be possible to oversample the stencil shadow buffer in order to achieve soft shadows, as performed in the upcoming ...