Wojtek is spot on (of course!) with his instructions H, but I agree with Greg about the better tape. I packed the decals I sent you between folded paper, held closed with some Tamiya masking tape. If you peel this off carefully, you can try it on something, and see the difference. I think you'll find it much easier to work with, and in many cases, you can still see the lines of panels etc through the tape, or at least their shape. It's more expensive than 'ordinary' tape, but worth it, and often lengths already cut can be re-used for some other jobs. It's also available in different widths - the one I sent is 10mm, one of the narrower ones.
Just a suggestion.