I get four "lm" lines back on a dual core processor...

I had thought all Xeons were 64 bit, but it turns out that memory was playing tricks on me. The earliest Xeons (branded "Pentium Xeon" not just "Xeon") were not 64 bit and were replacements for the Pentium Pro line (this seems like the stone age, now; I am reliably informed that it was indeed the silicon age, though); it wasn't until the 2004 Prescott/Nocona version that 64 bit came to Xeons.

I think that you can say that all of the dual core, and higher, Xeon chips (3000 series, 5000 series, 7000 series) were 64 bit, though, and that's very probably what you've got.

Only one note that I wanted to add was that different distributions have different names for their kernals, but anything with 'PAE' or 'big memory' in the description will a kernel that goes beyond the 32 bit adressing limitations.

...D'oh - try it as

The server will become a production webserver, running apache2-worker. It's not live yet, so we can mess with it. I want to make sure apache is utilizing the full hardware it has available.
Processor is 64bit capable.

In which case allow me to reconsider my recommendation. Think about using a 64-bit distro on it - the memory will be used more efficiently; HIGHMEM (on 32-bit) was a bit of a hack - some thoughts from Linus on that here. If you have the opportunity to start fresh, I'd say do so.

Is there a guide/tutorial that I can follow? I've recompiled the kernel once, but I am still a newbie in that realm (as you can see )

Ok, nevermind - I see what you mean. I think I'll install AMD64 distro on it.