To simplify the process of starting a new C30 project I have created a sample Makefile that takes care of most of the hard work of library paths, linker scripts, etc. Check it out at http://www.electricrock.co.nz/blog/microchip-c30/#makefile and let me know if you run into any problems.

I have made a minor update to the C30 install script so that it can build/install C30 v3.23b. The only real change (apart from updating filenames) is a new unattended install script for the non-free part.

Instructions and download here: http://www.electricrock.co.nz/blog/microchip-c30/.