diff --git a/README.md b/README.md
index 5fd33f0..4e50c43 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,2 @@
 # zigbee-OTA
-A collection of Zigbee OTA files
+A collection of Zigbee OTA files.
diff --git a/images/Hue/WhiteLamp-Atmel-Target_0105_5.130.1.30000_0012.sbl-ota b/images/Hue/WhiteLamp-Atmel-Target_0105_5.130.1.30000_0012.sbl-ota
new file mode 100644
index 0000000..594653e
Binary files /dev/null and b/images/Hue/WhiteLamp-Atmel-Target_0105_5.130.1.30000_0012.sbl-ota differ
diff --git a/index.json b/index.json
new file mode 100644
index 0000000..9b43353
--- /dev/null
+++ b/index.json
@@ -0,0 +1,10 @@
+[
+    {
+        "fileVersion": 1107326256,
+        "fileSize": 256632,
+        "manufacturerCode": 4107,
+        "imageType": 261,
+        "url": "TODO",
+        "path": "images/Hue/WhiteLamp-Atmel-Target_0105_5.130.1.30000_0012.sbl-ota"
+    }
+]
\ No newline at end of file
diff --git a/lib/ota.js b/lib/ota.js
new file mode 100644
index 0000000..de81648
--- /dev/null
+++ b/lib/ota.js
@@ -0,0 +1,58 @@
+const assert = require('assert');
+const upgradeFileIdentifier = Buffer.from([0x1E, 0xF1, 0xEE, 0x0B]);
+
+function parseSubElement(buffer, position) {
+    const tagID = buffer.readUInt16LE(position);
+    const length = buffer.readUInt32LE(position + 2);
+    const data = buffer.slice(position + 6, position + 6 + length);
+    return {tagID, length, data};
+}
+
+function parseImage(buffer) {
+    const header = {
+        otaUpgradeFileIdentifier: buffer.subarray(0, 4),
+        otaHeaderVersion: buffer.readUInt16LE(4),
+        otaHeaderLength: buffer.readUInt16LE(6),
+        otaHeaderFieldControl: buffer.readUInt16LE(8),
+        manufacturerCode: buffer.readUInt16LE(10),
+        imageType: buffer.readUInt16LE(12),
+        fileVersion: buffer.readUInt32LE(14),
+        zigbeeStackVersion: buffer.readUInt16LE(18),
+        otaHeaderString: buffer.toString('utf8', 20, 52),
+        totalImageSize: buffer.readUInt32LE(52),
+    };
+    let headerPos = 56;
+    if (header.otaHeaderFieldControl & 1) {
+        header.securityCredentialVersion = buffer.readUInt8(headerPos);
+        headerPos += 1;
+    }
+    if (header.otaHeaderFieldControl & 2) {
+        header.upgradeFileDestination = buffer.subarray(headerPos, headerPos + 8);
+        headerPos += 8;
+    }
+    if (header.otaHeaderFieldControl & 4) {
+        header.minimumHardwareVersion = buffer.readUInt16LE(headerPos);
+        headerPos += 2;
+        header.maximumHardwareVersion = buffer.readUInt16LE(headerPos);
+        headerPos += 2;
+    }
+
+    const raw = buffer.slice(0, header.totalImageSize);
+
+    assert(Buffer.compare(header.otaUpgradeFileIdentifier, upgradeFileIdentifier) === 0, 'Not an OTA file');
+
+    let position = header.otaHeaderLength;
+    const elements = [];
+    while (position < header.totalImageSize) {
+        const element = parseSubElement(buffer, position);
+        elements.push(element);
+        position += element.data.length + 6;
+    }
+
+    assert(position === header.totalImageSize, 'Size mismatch');
+    return {header, elements, raw};
+}
+
+module.exports = {
+    parseImage
+};
\ No newline at end of file
diff --git a/scripts/add.js b/scripts/add.js
new file mode 100644
index 0000000..4367dfc
--- /dev/null
+++ b/scripts/add.js
@@ -0,0 +1,58 @@
+const path = require('path');
+const fs = require('fs');
+const ota = require('../lib/ota');
+const filename = process.argv[2];
+
+const manufacturerNameLookup = {
+    4107: 'Hue',
+};
+
+if (!filename) {
+    throw new Error('Please provide a filename');
+}
+
+const file = path.resolve(filename);
+if (!fs.existsSync(file)) {
+    throw new Error(`${file} does not exist`);
+}
+
+const buffer = fs.readFileSync(file);
+const parsed = ota.parseImage(buffer);
+
+if (!manufacturerNameLookup[parsed.header.manufacturerCode]) {
+    throw new Error(`${parsed.header.manufacturerCode} not in manufacturerNameLookup (please add it)`);
+}
+
+const manufacturerName = manufacturerNameLookup[parsed.header.manufacturerCode];
+const indexJSON = JSON.parse(fs.readFileSync('index.json'));
+const destination = path.join('images', manufacturerName, path.basename(file));
+
+const entry = {
+    fileVersion: parsed.header.fileVersion,
+    fileSize: parsed.header.totalImageSize,
+    manufacturerCode: parsed.header.manufacturerCode,
+    imageType: parsed.header.imageType,
+    url:  'TODO',
+    path: destination,
+};
+
+const index = indexJSON.findIndex((i) => {
+    return i.manufacturerCode === entry.manufacturerCode && i.imageType === entry.imageType
+});
+
+if (index !== -1) {
+    console.log(`Updated existing entry (${JSON.stringify(entry)})`);
+    indexJSON[index] = entry;
+    fs.unlinkSync(entry.path)
+} else {
+    console.log(`Added new entry (${JSON.stringify(entry)})`);
+    indexJSON.push(entry);
+}
+
+if (!fs.existsSync(path.dirname(destination))) {
+    fs.mkdirSync(path.dirname(destination));
+}
+
+fs.copyFileSync(file, destination);
+
+fs.writeFileSync('index.json', JSON.stringify(indexJSON, null, '    '));
\ No newline at end of file