Default AVD on Eclipse for unlisted devices?

The two devices I own are the Samsung Galaxy S 4 and Samsung Galaxy Tab 4 10.1, I am just learning how to program in Java and I am new to Eclipse, I have added every apk and basically everything that was available in the android sdk downloader, how do you set up an emulator for these two devices, which are unlisted currently on eclipse?

I see one of the Nexus devices has the same screen size/resolution but that would not be the same skin and functionality for the Samsung Galaxy s4, right?



Thanks in advance

Ian