Targeting Latin American and other Spanish speakers via search engines

(Requires most likely Spanish/English speaking researcher)

Note:   sites submitted and information can be in either english or
spanish, mixed, however.

Interested in finding out:

The top search engines used by spanish speaking people who search in
spanish... best if broken down by 3 main areas:  1. Latin Americans   
2. US  hispanics (searching in spanish) and  3. Spain...
In rank order, best if have percentage used as well (ie... 15% of L.
Americans used Terra,  10% use Alta Vista, etc.)

As much general info as possible on obtaining high rankings within
these search engines to above target markets (ie in spanish)

Whether the above top search engines offer pay per click services, and
how to access them?

Other pay per click search engines relevant for this market.

Any general sites dedicated to Latin American / Spanish search
optimization techniques, search engines , etc  (note, i know about
most of the english ones... need more specific info).

Names/ contacts of firms or consultants that specialize in search
engine submission / optimization for the above spanish-speaking
market...  Ideally the names of several firms that are economical,
work mainly with smaller companies, or offer packages particularly
tailored to them.

Names of firms/ contacts that in general specialize in ecommerce
consulting/ work for above markets.

Note...   I already have some good sites on Latin America in
general... eg the LANIC site, others...    But, have not had luck
finding the above specific answers.     Please only reply / answer if
you feel that you can provide a fairly complete reply to the above.  
Thank you.