Bypassing the Windows 2000 Serial Check
First you want to copy your Windows 2000 setup files from your CD to your hard drive. You have to copy at least the I386 directory (I recommend copying all the files, so you can burn a complete CD later). Now go into the I386 directory you just copied onto your hard drive. Find the setupp.ini file. Right click it, select Properties, and remove the Read-only checkmark. Now open the file to edit it.
Your setupp.ini file should read something like this:
Replace the 3 X's (generally it'll be three zeros) at the end with "270". It should now read something like this:
Thats it! Now you can now install Windows 2000 without a serial number!