Ok - here's the straight dope:
My kernel version is 2.4.2-2
My kernel headers (previously not installed) are now installed, and version 2.4.2-2
I have dl'ed the ltmodem-6.00a.tar.gz from www.heby.de/ltmodem
(I have also dl'ed the original 6.00 mixed binary/source driver just in case)
I will attempt to run the ltmodem stuff and see whether I get the same error messages - a quick question however - the program allows you to use a flag detailing where the kernel-headers are installed if it can't be located automatically - how do I find the path where kernel-headers are installed?