Odin is the Samsung software that is used to push/flash firmware and firmware related items directly onto your device.
Odin is broken down into four parts, with 3 tabs. The tab in the picture, the OPTIONS tab, is the most important tab. Make sure the boxes on your copy of Odin look exactly like the boxes we have in our picture.
Next you will see BP, AP, CP, CSC. Of all the sections, AP will be the one that would be used to continue the process. This is the box you would click on to select and to load the firmware that we were able to supply for you.