[Wlug] sources???

I'm looking at some software I have to build at work, and I'm trying to work with RedHat 8.0, even though I don't have it yet. I'm curious about a particulare "binary" package: kernel-source-2.4.18-14.i386.rpm and similarly: glibc-kernheaders-2.4-7.20.i386.rpm These are clearly source files. How do they compare with: kernel-2.4.18-14.src.rpm ???? In particular, I'd like to try building my package (targeting 8.0) on my 7.2 box. (Maybe that's unrealistic. It's a fibre HBA driver module.) At any rate, why the mixup with the "sources"? And, why would header files be non-relocatable on the install? (At least the kernel headers are with 7.2. TIA, Bill