You should know that Ovi store apps and games can directly downloaded via your mobile device with the help of 3G or WiFi connectivity.
Here are some steps to follow
- Go to ovi store webpage http://store.ovi.com.
- Log into your Nokia account, if don't have one, you can register, its free of course.
- Select the app or game you want to install. For example, i have selected Fruit Ninja lite game. Now in your browser you can see the link as http://store.ovi.com/content/104353
- Now re-write the link as http://store.ovi.com/content/104353/download and click Enter on your keyboard, You can download the sis file to your PC
Please note you need a Nokia account to download any files off the ovi store, via PC or mobile phone.