Using a loader is quite easy, once you have the programmer set in the correct phoenix mode, and have the correct com port selected.
If you download one of the loaders, there are several different versions but all of them seem to have the same basic settings, the only 2 options you should be interested in are the Clean Card and Load File buttons.
Clicking the Clean Card should restore your card then you can simply click on the load file option, navigate to the file, you have downloaded and unzipped, and let the program load the card.
If you have ever programmed a Titanium, or MII card, before it looks very similar.