What I basically want to do is setup an xserver on my desktop computer, and be able to access it through my laptop.

My desktop is way better than my laptop (its basically a terminal).

If somebody could direct me to the proper documentation, what do I need to read, what do I need to know?... any tutorials? please help me out.

I'm assuming you mean an X server on your laptop that connects to your desktop so you can control your
Desktop from your laptop. This is easy, enable XDMCP on the desktop (gdmsetup if you are using GDM) and then from the laptop in an x server run

X -query 192.168.2.1xx :1

Note:Replace with the IP address with the one of your desktop.
Note:Two spaces between ip address and :1

When using a Linux desktop, you are using an x server. If you are using Computer B to control Computer A, the X server is actually running on Computer B and Computer A is running the X Client. It kind of seems backwards but it makes sense if you understand how X works.

i can't get it to work yet.

i think i've done the xdmcp part right. its running.

but i still got questions.

is it really necessary to start my desktop *server* with runlevel 4 (on slackware its supposed to be the window manager thing)

i do the X -query myipaddress__ :1 and all i get is an X with a black screen... it seems like its gonna work, but it doesn't, what am i missing here?

or maybe im not missing anything, and this thing is just plain slow. my laptop is on a wireless card.. do i need more speed for this to work?

If you are running a firewall on your desktop, make sure port 177 (for both tcp and udp) is open to your laptop. Also make sure XDMCP is running, by using the config tools specific to your distro.