add install_from_cd.sh, which will get the contents off your OP4 CD and grab all the patches from archive.org

install_from_cd.sh

@@ -0,0 +1,64 @@
+#!/bin/sh
+
+mk_pk3()
+{
+	tree -fi > ./build_contents.txt
+	sed -i '/build_contents/d' ./build_contents.txt
+	sed -i '/directories,/d' ./build_contents.txt
+	zip -0 "$1".pk3 -@ < ./build_contents.txt
+	rm ./build_contents.txt
+	mv "$1".pk3 ../"$1".pk3
+}
+
+# grabs a patch .zip from archive.org and saves it as a pk3
+grab_patch()
+{
+	wget -nc -O ./pak$2.pk3 http://archive.org/download/hl_shareware_data/gearbox/$1.zip
+}
+
+SCRPATH="$( cd "$( dirname $(readlink -nf $0) )" && pwd )"
+OUTPK3DIR="pak1_retail.pk3dir"
+
+if ! [ -x "$(command -v rsync)" ]; then
+	printf "Error: rsync is not installed.\n" >&2
+	exit 1
+fi
+if ! [ -x "$(command -v tree)" ]; then
+	printf "Error: tree is not installed.\n" >&2
+	exit 1
+fi
+if ! [ -x "$(command -v zip)" ]; then
+	printf "Error: zip is not installed.\n" >&2
+	exit 1
+fi
+
+if ! [ $# -gt 0 ]; then
+	printf "Path to MOUNTED CD-ROM folder, e.g. /mnt/cdrom:\n"
+	read CDROM_PATH
+else
+	CDROM_PATH="$1"
+fi
+
+if ! [ -f "$CDROM_PATH"/OPFOR/gearbox/pak0.pak ]; then
+	printf "Error: pak0.pak not found in $CDROM_PATH.\n" >&2
+	exit 1
+fi
+
+# Let's shove them all into a convenient .pk3dir
+mkdir -p "./$OUTPK3DIR"
+rsync -av "$CDROM_PATH"/OPFOR/gearbox/ "./$OUTPK3DIR/"
+chmod -R +w "./$OUTPK3DIR/"
+mv -v "./$OUTPK3DIR/pak0.pak" ./pak00_cd.pak
+cd "./$OUTPK3DIR"
+mk_pk3 pak01_cd
+cd "$SCRPATH"
+
+# Get the latest patch, because that'll fix the menu assets and add more fun, free content
+grab_patch 10011100 02_1100
+grab_patch 11001101 03_1101
+grab_patch 11011103 04_1103
+grab_patch 11031104 05_1104
+grab_patch 11041106 06_1106
+grab_patch 11061108 07_1108
+
+rm -rfv "./$OUTPK3DIR"