Are you talking about adding a font to your computer?
If so, all you need is the font file. But how you add it depends on what operating system you're using.
But if you're talking about adding templates and effects to Premiere Elements, well, there it gets a bit more complicated. There are ways to do it by copying the files from another computer, but it's not easy. So unless you're pretty computer literate, I'd just find a way to temporarily connect your main computer to the internet.
Once you've done that, you can select the option to Download All and get the whole set in one big (several gigabytes) download.
thaks for your answer. I need to do the second option. Well, my problem is the computer where I work with premiere elements doen´t have internet connection. If I could dowload in an other computer, them I can install in my computer?
Well, as I said, how you do it depends on what operating systems your computer(s) are running.