diff --git a/README.md b/README.md
new file mode 100644
index 0000000..7df8c6b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,36 @@
+# SteamPlay-Custom
+
+When selecting this tool, the *Steam Client* will launch a different program depending on the AppID.
+
+## Configuration
+
+You can define the program it launches via the **~/.config/steamcustomrc** file. An example is provided in the **example/** directory.
+
+The config syntax is as follows:
+
+`appid:application with parameters`
+
+In the case of Unreal:
+
+`13250:unreal`
+
+Each line contains its an appid and a launch command, separated by a `:` symbol.
+Only the first instance of an AppID is recognized.
+You can supply as many parameters as you like.
+
+If you'd like to enable the *Steam Client* to append its launch parameters to your target as well, append this:
+
+`appid:application with parameters`**`:parms`**
+
+## Finding out AppIDs
+
+Launch any application in Steam with this tool and you'll get a notification on your desktop. It displays the AppID it is trying to launch.
+
+## History
+
+I wrote a handful of compatibility tools that essentially did the same thing: Use the native version of a program or game.
+This basically just streamlines all my previous tools into one.
+
+## LICENSE
+
+CC0
diff --git a/example/steamcustomrc b/example/steamcustomrc
new file mode 100644
index 0000000..fde4a79
--- /dev/null
+++ b/example/steamcustomrc
@@ -0,0 +1,20 @@
+:70:nuclide -game valve
+:220:hl2
+:2310:quake:parms
+:9040:quake -hipnotic
+:9030:quake -rogue
+:2320:quake2
+:2340:quake2 -game rogue
+:2330:quake2 -game xatrix
+:2200:quake3
+:2350:quake3 +set fs_game missionpack
+:9050:doom3
+:9070:doom3 +set fs_game d3xp
+:793670:tw
+:273570:descent
+:273580:descent2
+:13240:ut
+:3970:prey
+:2300:woof -iwad doom2.wad
+:13250:unreal
+:10050:etqw
diff --git a/wrapper b/wrapper
index 0706023..aeb0557 100755
--- a/wrapper
+++ b/wrapper
@@ -1,24 +1,54 @@
-#!/bin/sh
+#!/bin/bash
+
+# source our .bashrc if present
+if [ -f "$HOME/.bashrc" ]
+then
+. $HOME/.bashrc
+fi
 
 SPC_CFG="$HOME/.config/steamcustomrc"
 COMMANDTYPE=$1
 
-if [ "$COMMANDTYPE" = "wait-before-run" ]; then
-	# env check
+if [ "$COMMANDTYPE" = "wait-before-run" ]
+then
+	# client forwards this env to us
 	STEAM_APPID="$SteamGameId"
 
-	# find something valid, first result only
-	CHECK_GAME=$(grep "$STEAM_APPID:" "$SPC_CFG" | head -n 1)
+	# find valid entry, first result only
+	CHECK_GAME=$(grep ":$STEAM_APPID:" "$SPC_CFG" | head -n 1)
 
 	# nothing found? throw a message...
-	if [ -z "$CHECK_GAME" ]; then
+	if [ -z "$CHECK_GAME" ]
+	then
 		notify-send -a "SteamPlay-Custom" \
 			-i "steam" "SteamPlay-Custom" \
 			"AppID $STEAM_APPID has no entry in $SPC_CFG"
 		exit
 	fi
 
-	# run our alternative
-	RUN_GAME=$(echo "$CHECK_GAME" | cut -d ':' -f 2)
-	exec $RUN_GAME
+	# grab our alternative
+	RUN_GAME=$(echo "$CHECK_GAME" | cut -d ':' -f 3)
+
+	# check for empty launch parameter
+	if [ -z "$RUN_GAME" ]
+	then
+		notify-send -a "SteamPlay-Custom" \
+			-i "steam" "SteamPlay-Custom" \
+			"No program supplied with AppID in $SPC_CFG"
+		exit
+	fi
+
+	# check if steam launch parms are allowed
+	RUN_PARM=$(echo "$CHECK_GAME" | cut -d ':' -f 4)
+
+	# run it
+	if [ "$RUN_PARM" = "parms" ]
+	then
+		PARMARR=( "$@" )
+		ARGLEN=${#PARMARR[@]}
+		GAMEARGS=${PARMARR[@]:2:$ARGLEN-1}
+		exec ${RUN_GAME} ${GAMEARGS}
+	else
+		exec ${RUN_GAME}
+	fi
 fi