Includable NSIS installer script and example

bin/i2p-zero.nsi

@@ -1,6 +1,8 @@
 
 !define ZERONAME "I2P-Zero"
-!define I2PINSTDIR "$PROGRAMFILES64\${APPNAME}\"
+!define I2P64INSTDIR "$PROGRAMFILES64\I2P\"
+!define I2P32INSTDIR "$PROGRAMFILES32\I2P\"
+!define ZEROINSTDIR "$PROGRAMFILES64\${APPNAME}\"
 
 function buildZero
 	!system "echo '#! /usr/bin/env sh' > build-docker.sh"
@@ -21,10 +23,19 @@ function buildZero
 functionEnd
 
 function installZero
-	CreateShortcut "$SMPROGRAMS\Run I2P-Zero.lnk" "$I2PINSTDIR\router\i2p-zero.exe"
+	${If} ${FileExists} `$I2P64INSTDIR\I2P.exe`
+
+	${If} ${FileExists} `$I2P32INSTDIR\I2P.exe`
+
+	${Else}
+		SetOutPath $ZEROINSTDIR
+		File /a /r "./I2P-Zero/"
+
+		CreateShortcut "$SMPROGRAMS\Run I2P-Zero.lnk" "$ZEROINSTDIR\router\i2p-zero.exe"
+	${EndIf}
+
+
 
-	SetOutPath $I2PINSTDIR
-	File /a /r "./I2P-Zero/"
 
 functionEnd