I have updated the download.

jscript_model_year.js changed to .php:
correction to show breadcrumb elements in the right order on the results page (already mentioned in the thread)
correction to maintain language when selection changed
correction to allow use of commas in category descriptions (new)

modellist.php, correction to allow use of commas in category descriptions (new)

css completely changed

_noscript_ GO buttons changed to both .gif (previously one was .jpg other was .png)