For those who do not know, osCommerce is a shopping cart system with the majority of the english language text already pre-translated to French/German etc.
The more you change the osCommerce system from the standard build, the more bits need translating into the non-english language.
Thus I have several .php files which you will need to check and compare, in order to provide translated text.
The work is pretty simple, but you will need to know some basic HTML to be able to insert grave/acute/etc. accents into the translated versions.
The filenames will all stay the same, the capitalized text will all stay the same, you will only need to translated the incorrect text in the single quotes.
Quick work for a GOOD french speaker with an hour or two.