[Xastir] mobile computer

[N1OFZ]

Hi everyone,

I just got a new "used" car this weekend.  I disconnect the OnStar 
system and patched into the Motorola Oncore GPS.  I also have a 533MHz 
fanless 12V computer (10.25"(D) x 8.25"(W) x 2.5"(H)) that is going to 
be mounted under the passenger seat.

What I need to know is what Xastir friendly Linux distro is the 
smallest.  I have a 256MB flash disk w/ IDE interface that I was going 
to use as the main drive in the machine.  This way when the car turns 
on, Linux boots from the flash drive.  No moving parts and quick boot.  
Does anyone know of a distro w/ X that will fit into about 256MB?  My 
other thought is to put in an extra 10GB laptop that I have.  By doing 
this I can load the kernel (and whatever else I can cram into the 256) 
on the flash drive and everything else on the hd.  Thoughts?  Comments?

Thanks,
Dana  N1OFZ