Due to a less than helpful response from the Arch forums (0 replies) I'm back again to figure out the annoyances of PXE booting. This is mostly because while everyone supplies information on booting their distro from their distro, there isn't much in the way of help for booting other distros by PXE from their distro, or the documentation available isn't up to date or doesn't function.

There's two articles in the Arch Wiki (http://wiki.archlinux.org/index.php/PXE and http://wiki.archlinux.org/index.php/...-as-pxe-server respectively) which I've tried, to no avail, there's the AUR package 'archiso-pxe-server' (which has been tried on both a desktop and on a Live ISO image) which also didn't work, and attempts to use the same method that Ubuntu uses to install via PXE also didn't work, as it uses completely different packages. Even a little creative improvising, trying to use similar packages didn't work, though that was also probably a bad idea.

So I'm left wondering if it's even possible to make Arch serve a PXE boot, let alone make it bootable on the destination system.

What exactly are you trying to accomplish? To get PXE booting to work
you just need to configure a dhcp server and set up a tftp server.
There are many documents that explain how it works, so I'm guessing
that you want to have a particular boot image.

There are several options available, the easiest being a small image
that is already prepped. You may also find live cds or even images
with network shares that are designed for thin clients. What is your
goal?

The goal, as stated above is that I intend to use PXE, to install Arch on my laptop, from a pre-existing Arch system on my desktop. No different to using a Ubuntu install to serve Ubuntu, and so on.
The problem lies in the fact that the two documented solutions I linked to, and the one AUR package also mentioned, have managed to achieve nothing at all, not even so much as the destination computer acknowledging that Arch is meant to be a PXE server.

Okay, I missed that you're trying to do an install. Since I know nothing
about Arch and quite a bit about PXE, you'll have to bear with me.

First, do you have a boot image that kicks off the installation process?
Many distros have a "netboot" image designed specifically for this.

If the answer is yes, the first step is to set up your dhcp and tftp
services.

If the answer is no, you'll have to find or create one.

Problem solved by my own lack of foresight. Only now have I realised I'm trying to use the wrong device to boot from on the destination.