RL> Xwindows is in 2 parts, the x server and the window 
 RL> manager, right?  Now porting the server to run in 
 RL> the background sounds easy enough, would it be 
 RL> possible to use the PM (or write a program/driver 
 RL> for the PM) to use the PM as the window manager?
 
   X involves two parts - the X server (the user's terminal) and the X
client (the program that's drawing on the user's screen and listening to
the user's keyboard and mouse). The window manager isn't an inherent part
of this and is usually just a special case of X client.
 
    As for getting X programs running on the PM desktop, you just need a PM
X server. IBM sells their X Window System Server Kit which is more
commonly known as (big suprise) PMX. No idea how much it costs, but it
runs on top of TCP/IP 2.0. I've had it working over Warp's IAK as well.
 
     The flip side of writing programs that run under OS/2 which get their
user interface from an X server, I know less about. You'll need the TCP/IP
Programmer's toolkit, and the X Window System Client Kit. I'm not sure how
source compatible the latter is with the Unix libraries they imitate, but I
suspect it's closer than the Programmer's toolkit since there's an
additional layer of code there to take care of OS differences.

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