diff --git a/scripts/install_fw_custom.sh b/scripts/install_fw_custom.sh
new file mode 100755
index 0000000..a3576f0
--- /dev/null
+++ b/scripts/install_fw_custom.sh
@@ -0,0 +1,93 @@
+#!/bin/bash
+
+#   Copyright (C) 2017 by Andy Uribe CA6JAU
+
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program; if not, write to the Free Software
+#   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+# Change USB-serial port name ONLY in macOS
+MAC_DEV_USB_SER="/dev/cu.usbmodem1441"
+
+# Check if arguement is supplied for bin path. If not, use default.
+if [ -z "$1" ]; then
+  	BIN_PATH="../bin/outp.bin"
+    echo "No path to bin file supplied, trying the default location."
+else
+	BIN_PATH="$1"
+fi
+
+# Check if bin file exists
+if [ -e $BIN_PATH ]; then
+    echo "Attempting to flash $BIN_PATH"
+else
+    echo "$BIN_PATH doesn't exist!"
+    exit 1
+fi	
+
+# Download STM32F10X_Lib (only for binary tools)
+if [ ! -d "./STM32F10X_Lib/utils" ]; then
+  git clone https://github.com/juribeparada/STM32F10X_Lib
+fi
+
+# Configure vars depending on OS
+if [ $(uname -s) == "Linux" ]; then
+	DEV_USB_SER="/dev/ttyACM0"
+	if [ $(uname -m) == "x86_64" ]; then
+		echo "Linux 64-bit detected"
+		DFU_RST="./STM32F10X_Lib/utils/linux64/upload-reset"
+		DFU_UTIL="./STM32F10X_Lib/utils/linux64/dfu-util"
+		ST_FLASH="./STM32F10X_Lib/utils/linux64/st-flash"
+		STM32FLASH="./STM32F10X_Lib/utils/linux64/stm32flash"
+	elif [ $(uname -m) == "armv7l" ]; then
+		echo "Raspberry Pi 3 detected"
+		DFU_RST="./STM32F10X_Lib/utils/rpi32/upload-reset"
+		DFU_UTIL="./STM32F10X_Lib/utils/rpi32/dfu-util"
+		ST_FLASH="./STM32F10X_Lib/utils/rpi32/st-flash"
+		STM32FLASH="./STM32F10X_Lib/utils/rpi32/stm32flash"
+	elif [ $(uname -m) == "armv6l" ]; then
+		echo "Raspberry Pi 2 or Pi Zero W detected"
+		DFU_RST="./STM32F10X_Lib/utils/rpi32/upload-reset"
+		DFU_UTIL="./STM32F10X_Lib/utils/rpi32/dfu-util"
+		ST_FLASH="./STM32F10X_Lib/utils/rpi32/st-flash"
+		STM32FLASH="./STM32F10X_Lib/utils/rpi32/stm32flash"
+	else
+		echo "Linux 32-bit detected"
+		DFU_RST="./STM32F10X_Lib/utils/linux/upload-reset"
+		DFU_UTIL="./STM32F10X_Lib/utils/linux/dfu-util"
+		ST_FLASH="./STM32F10X_Lib/utils/linux/st-flash"
+		STM32FLASH="./STM32F10X_Lib/utils/linux/stm32flash"
+	fi
+fi
+
+if [ $(uname -s) == "Darwin" ]; then
+	echo "macOS detected"
+	DEV_USB_SER=$MAC_DEV_USB_SER
+	DFU_RST="./STM32F10X_Lib/utils/macosx/upload-reset"
+	DFU_UTIL="./STM32F10X_Lib/utils/macosx/dfu-util"
+	ST_FLASH="./STM32F10X_Lib/utils/macosx/st-flash"
+	STM32FLASH="./STM32F10X_Lib/utils/macosx/stm32flash"
+fi
+
+# Stop MMDVMHost process to free serial port
+sudo killall MMDVMHost >/dev/null 2>&1
+
+# Reset ZUMspot to enter bootloader mode
+eval sudo $DFU_RST $DEV_USB_SER 750
+
+# Upload the firmware
+eval sudo $DFU_UTIL -D $BIN_PATH -d 1eaf:0003 -a 2 -R -R
+
+echo
+echo "Please RESET your ZUMspot !"
+echo