The meanings of "with"

Hello!

I'm a little confused with a certain use of the word "with"...

Let's say I typed a letter and saved it as a DOC file. If I want to tell you that you can print my letter using this DOC file, can I just say:

"Print the letter with this file." / "You can print the letter with this file."

At first, to me, it sounded more like an instruction to print the letter AND the file.

Anyway, would it make any difference if I say:

"With this file, you can print the letter."

Would you suggest any better way to instruct someone to use a certain file to print a certain document?

Thanks!