Mike,
If you are not having to use a solvent solution in order for the decals to conform to an irregular surface, you can do this job easily. Use a setting solution cut by 50% with warm water for decal placement. Try to use the minimum amount of water to place the decal on the model. That will insure that the decal you are placing it next to will not unstick itself. Try only dipping the decal into the warm water solution for a second, then placing it on a clean surface, letting the decal lift from the backing in the bubble of water that it is sitting in. That way you are working with the minimum amount of water from the get go. After the decal is in place, wick the excess water away with an corner of small cloth or paper towel. I like to use a lint free cloth that is cut into small 2" X 2" pieces. The lint free cloth insures no tiny unwanted fuzz is trapped with the decal when it dries. After the water is wicked away, a hairdryer on a low setting is used to completely dry the decal in place. Let the decal cool a little bit, then move to the next decal. You'll figure it out quickly on how long it will take for each step. With that many letters, you might want to take a lot of breaks! I hope this helps.
Cheers!
Joseph