First of all, you need to get the NaviSEA folder (Malaysia + Singapore Maps) ready.
1. Go to your Galaxy S2.
2. Open Settings and click on Wireless and Network.
3. Select USB utilities.
4. Click on Connect Storage to PC.
5. Now, plug your USB cable to your phone.
6. You should see a Green Android display.
7. Click on Connect to the USB Storage.
8. The Android logo will turn to Orange color.
9. Now, you may copy the NaviSea folder over without any issue.