I modified the functions which shows the page numbers in search results so they all work in the same way:
- comments page have next/previous links link vehicle pages
- vehicle pages have a reduced amount of page numbers shown (e.g. if you search for a make, it is not useful to make a list of all pages from 1 to 100, it only shows firsts, lasts, and the ones around current pages).
If you notice errors on some pages, or with some search options, please notify me.

I also added a country origin selection in the search page. It was already possible to search by country, but one had to either edit the url to add the parameter, or use the statistics page to access to country search.

http://www.imcdb.org/movies.php

'Browse by movie and TV series title'
Only page 1 works. The rest 'Error 404'

Indeed, thanks!
I fixed it