First of all, thanks for all the helpful replies. Especially to hsmyers because I was starting to think that I was the only one who ever wanted to print-out code in such a way. And also to Thorkild. I've just had a look at a2ps and it seems that it might do the trick, especially with the patched matrix.pro file.

I might still try to implement it using perl and outputting html etc. in the future but in the meantime, I'll use the right tool for the right job.

thanks again!