->Compiler and Debugger
->Select GNU/C and click "Copy"
->Name it whatever you want (GCW Zero Compiler?)
On the tab "TOOLCHAIN EXECUTABLES" change the Compiler's installation directory from "/usr" to "/opt/gcw0-toolchain/usr" and on the boxes name the binaries ranging from "gcc" to "gdb" to mipsel-linux-*, e.g: gcc = mipsel-linux-gcc. (don't rename make, make stands as-is)