After you download your theme file from the internet, here's how to transfer it to your PC.
Install the Nokia PC suite from the CD that you got with your phone.
Connect your Phone to your PC using a compatible data cable or Bluetooth (If your PC is Bluetooth compatible).
After your phone sync's up with your pc, open My Computer.
Double-click on Nokia Phone Browser
Now you should be able to see what's stored in your phone memory and on the memory card.
Open the source where you stored your themes file.
Copy them, and paste it to Memory Card > Themes directory of your phones memory card.
On your phone, navigate to Settings and you will find the copied themes.
Navigate to the file and select the theme and select Apply.
Install the Nokia PC suite from the CD that you got with your phone.
Connect your Phone to your PC using a compatible data cable or Bluetooth (If your PC is Bluetooth compatible).
After your phone sync's up with your pc, open My Computer.
Double-click on Nokia Phone Browser
Now you should be able to see what's stored in your phone memory and on the memory card.
Open the source where you stored your themes file.
Copy them, and paste it to Memory Card > Themes directory of your phones memory card.
On your phone, navigate to Settings and you will find the copied themes.
Navigate to the file and select the theme and select Apply.