Initial requirement
- A compression Utility to unzip the themes
- A compatible cell phone running Symbian OS 3rd edition, 5th edition, Symbian^3,  Anna, Belle.
- The Nokia Pc Suite software, or equivalent software from other manufacturer
- A Usb cable or Bluetooth adapter

1) The first step is to download a theme.

2) When the download is completed, you have to extract the theme files. To do so, you should use a compression utility  to open .ZIP files. Most users already have a software like this on their computers.

3) Once you have extracted the SIS files, you will find in your package more than one theme:
- Theme Title – This theme installs with Custom icons.
- Theme Title (“lite” or “default”) – This theme installs without icons. You will use your phone’s standard icons

4) Now, make sure you have installed the Nokia PC Suite software that comes with your Nokia Phone, or equivalent software from your phone manufacturer. If you do not have Nokia Pc Suite installed, you can download here for free.

5) Then, connect your phone to the PC using the USB cable or bluetooth adapter, and select “Pc Suite” mode. The Phone should be now connected to the pc (an upper screen icon on the phone will that you that).

6) Double-click on the *.sis file that you downloaded, it will say “install application on phone?” Click Yes.

7) The installation now continues on the mobile phone.

Accept all the terms and  read carefully the advices. Then , the phone will ask you if you want to install the theme on the phone memory or on memory card. Choose one, according on  your desire and free space available. (Recommend to install themes on phone memory, but only if you have enough free space).

8) The installlation is now finished, and you are ready to use your new theme! You will find it in your Themes folder, that may vary depending from you phone model.