Problem with Internet Sharing in Mac OS X

I have unofficially graduated from Republic Polytechnic and I'm here back at my hometown Hanoi. Currently, I only have wired connection at home. The router is not around and I have so many devices that I want to connect to the Internet. Luckily I have my spare Macbook (old Santa Rosa generation) which I could use to share the Internet from Ethernet. However, there was a problem with devices not being able to obtain the correct IP addresses (most probably due to DHCP). So I've managed to Google my way out from this problem. Here are some steps you have to take in order to get Internet Sharing to work:

1. Start Internet Sharing normally
2. Open Terminal, type: cp /etc/bootpd.plist /tmp/
3. Stop Internet Sharing
4. In Terminal type: sudo nano /tmp/bootpd.plist
5. Change the last  4 to 0
6. Save it and: sudo cp /tmp/bootpd.plist /etc/

I'll try to write a simple applescript to automate copying bootpd file from /tmp to /etc and start Internet Sharing. Come back to see the updated entry