OEM = Original Equipment Manufacturer. Basically means that it is an original part and not aftermarket.
I tape the whole thing in place and then do one end at a time, starting in the middle, while the tape holds the other end in place with vinyl decals. I think you can still wet the surface with water with the OEM decals to position them and then squeegee it out to get rid of the bubbles, but don't quote me on that. If you can't wet them, I'd start in the middle and work towards the end laying the decal down as you go to keep the air out.
There should be instructions with the decals. If not I'd call Yamaha or a dealer and find out how they do it. The long ones are easy to screw up.