If you want to save space, first select which archives you want to unpack. If you can't decide what to pick and you have 52Mb of disk space, it's safe to unpack everything.
At a minimum you need to unpack the 'required' X332*.tgz
archives plus at least one server that matches your vga card. You'll
need 13Mb for the minimum required run-time binaries only.
all the executable X client applications and shared libs
the misc, 75 dpi and PEX fonts
data files needed at runtime
customizable xinit and xdm runtime configuration files
8-bit color for IBM 8514 and true compatibles.
8 and 16-bit color for AGX and XGA boards.
8 and 16-bit color for I128 boards.
8 and 16-bit color for ATI Mach32 boards.
8, 16 and 32-bit color for ATI Mach64 boards.
8-bit color for ATI Mach8 boards.
1-bit monochrome for VGA, Super-VGA, Hercules, and others.
8, 16, and 32-bit color for Weitek P9000 boards (Diamond Viper).
8, 16 and 32-bit color for S3 boards.
8 and 16-bit color for S3 ViRGE boards.
>=8-bit color for Super-VGA cards.
4-bit color for VGA and Super-VGA cards
8-bit Color for ET4000/W32, /W32i, /W32p and ET6000 cards.
8-bit color for PC98 GA-98NB/WAP boards
8-bit color for PC98 PEGC
8-bit color for PC98 NEC-CIRRUS/EPSON NKV/NKV2 boards
8-bit color for PC98 WAB-S boards
8-bit color for PC98 WAB-EP boards
8-bit color for PC98 WSN-A2F boards
4-bit color for PC98 EGC
8 and 16-bit color for PC98 Trident Cyber9320/968x boards
>=8-bit color for PC98 Millennium/Mystique cards.
8-bit color for PC98 Cirrus755x boards
8 and 16-bit color for PC98 NEC S3 boards
8 and 16-bit color for PC98 S3 PW/PCSKB boards
8 and 16-bit color for PC98 S3 PW/LB boards
8, 16 and 32-bit color for PC98 S3 GA-968 boards
A nested server running as a client window on another display.
READMEs
READMEs in PostScript
READMEs in HTML
man pages
100dpi fonts
Speedo and Type1 fonts
Japanese, Chinese and other non-english fonts
Cyrillic fonts
the font server and its man page
config, lib*.a and *.h files needed only for compiling