Well, fr the most our mods are pretty straight forward to install, find, replace with, after or before add ...
The tricky part is when it come to url rewriting, since you need to implement an .htaccess (though, we have an.htaccess generator) and it requires some strategical choices (being the real hard part).
My advise would be to set up a local install
of our SEO premod
to start with, it's a great and simple way to better understand the possibilities and to make wise choices for SEO.
Then, if you later decide to install the mod separately, you may need to read this simple tutorial about the mod format : How to install a MOD