Server :: How To Setup Diskless PXE Client On Debian Lenny (HPC)

I currently have a debian lenny high performance cluster running seamlessly using dhcp and tftpd-hpa. All nodes are completely diskless, and i would like to keep it that way. I now would like to have a client boot over local into a full KDE desktop.

Here's the cache.
1. I would like the client to also be a node. I would like it to handle processing as the other nodes do, but this one with a full desktop, with ALL data and privileges accessible.
2. The client will have its own workstation graphics. It will need to have that driver loaded without slowing the system.
3. Client will need to be able to use its own usb, bd-rom, dvd, audio, etc. even though it will be booting into the HPC.
4. Wireless. I cannot run 70 ft of lan across an apartment. not happening.

The idea is a media center applicable "powerhouse" with high-end power and graphics for easy media editing, 3d creation, and gaming. Will also be used for webcache over all local, file sharing, and other server applications.

HPC specs:
-headnode: hp compaq p4-ht 3.2 ghz, 4x500gb, 4gb mem, gigabit ethernet, wireless-N
-nodes: 4x p4-ht 2.2 ghz, 2gb mem, no-name brand slim desktops; 2x panasonic toughbooks p4-mobile 1.8 ghz, 1.5gb mem; 3x gateway p3 unknown specs; and 1 hp 530 notebook 1.6ghz core2 duo, 1.5gb mem
-client: hp compaq core2 duo 2.13 ghz, 4gb mem, wireless n, bd-rom, 2x dvd-rom, usb 3.0 card, bluetooth, 1gb AGP nvidia geforce 6800 dual-dvi, no hd.
I need to know how to set up this PXE.