thanks for your quick answer.
my 2014 map is already on a single layer disc. I have deleted all except the French language (I'm french ...). also, sorry for my bad English.

What are the "padding files"? it's the DB directory and the BIBLIOGR file ?
What is the "teh sl files"?

I only have the 2003 map (original) and also 2013 and 2014 maps ...