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Search engine submission died in the 90's.
All you need to do is get incoming links to your site, and there's no need to "submit" at all.
Jim
jdMorgan nailed it smack dab on the head for you, and
he dinna charge ya a single dime for the
consultation.
What you want, and need, are links with decent anchor text on pages which the SE's already know about. The SE bot will find you via those links.
That's still very useful, but the subject of this thread appears to be periodic resubmission -- the old "Submit your site to 10,000 search engines every 30 days" scam... Now that is deader than a doorknob, IMHO.
Get a number of links from other well-ranked, on-topic or related-subject sites, with varied link text that is on-topic for your site. The free-inclusion robots will find those links and include your pages, even if you never "submit" a single page.
Jim