i get confused about the difference between footprint and packaging?

CrossRoads:
Is this for Eagle? You can often look in the Burr-Brown section, find REG1117 in SOT223 package, confirm the GND-Out-In pinout matches, and use that. On the schematic, right click and Name it TLV1117-33CDCYR so it shows up correctly when you create Export a Parts List.

i use OrCAD and there is a place where i need to input PCB footprint for all symbols,
SOT223 isn't enough? and please explain why

is it because pin1 and pin4 (vout) are the same?

i just in the stage of creating the schematic something like this (for example):

i need to send this to someone who will use allegro for PCB design and this is the information that he need to create the board.