The so-called "SEO" modules that re-write URL's are now part of ancient history, and no longer need to be used.
They may actually have a detrimental effect on your site ranking in search engines.
I have never used them, never advocated that my (many) clients use them, and in fact I steer well clear of them.
And many of my clients enjoy prominent positions in SERPS (many in top spot for important keywords).
I have one client who gets position 1, 3,4 and 8 on page one of a google search for a specific (important) key word - and we have never paid the slightest attention to all the SEO nonsense that is endemic on the www.
Just make sure the content is good, relevant, meaningful and comprehensive. Get good sites to reference your url's. Get XMLSitemaps installed and regularly add and edit content to keep it topical.
Avoid these SEO things. They are no longer necessary.