You need an internet connection and a Playstation Network Account if you mean the PlayStation Store
First you need the system updated to be able to go to the Playstation Store and you need to have an account. Demos you do not have to pay for so it is not necessary to have money in your wallet. Of course you needed an internet connection and then at the Playstation store just pick a PSP game demo and you will be able to download it. Myself I use the PS3 because I can store it in the PS3 harddrive.
After you download a demo from the Playstation store it must be installed by going to the games section of your XMB and clicking on the game title. After it has been installed you only need to click it to play
You don't need anything but the latest official firmware, to be able to download games from the PSN.
You can't run unsigned code on a PSVita, that means you need to download games from the PSN.
You don't need to, PSVita games are downloaded straight from the PSN.
Boxhead- The Zombie Wars is avaible for download on iTunes and Android. You will need to visit the Google Play store and click to install. There will be prompts telling you what to click to download the game.
You need a DSi or XL to do it, they can go on the DSi Store to purchase and download games.
You need to connect to the DSi store, and pay for them there. You can then download them to your DSi.
All you need is to visit the app store (Amazon Appstore or Google app store) and choose from a wide variety of applications.
To download games on the iPhone you need to create an account with the Apple store. Once you have made an account, you can then purchase games from it.
Yes you need a Broadband Cable or DSL connection and need to download from the PSN Playstation Store
The Viamichelin app is a free download offered for several different platforms. Depending on the platform you need, you can get this download either from the Iphone app store, or the Android Marketplace.
You need internet access; you need to download them from the PlayStation Store.
In order to get the Android version of Minecraft on a Nook HD, you will need to root it. That will allow you to install Google Play Store, which will be able to download and install Minecraft.
Yes, Picasa app can be downloaded over the Android Tablet you need to head over the Google Play Store option over you device ans search for "Picasa".
No, you need a DSi at least, to be able to access the DSi store.
Yeah, just download them from the PlayStation Store. (You need internet access, though)