Hi,
Sorry I caught that thread a bit late.
For the livery of your loco this may help:
http://ffmf.railfrance.org/mondial/5MMR/asoc/zero/vitrin231DOuest_AlainLEBORGNE.jpg
Concerning the rolling stock, I would need further investigation. Bare in mind that the french stock in HO is quite limited and rather expensive.
Were there any (non-electric) loco hauled specials which would have run from the Nantes region through to the French/Swiss border, possibly beyond?
before the SNCF took over there were in France ( you may know that) few companies (PO, OUEST , PLM...) like in Britain (LMS, GWR and so forth) those travels were unlikely to be done. Even when the SNCF took over many lines were running through Paris with a change of station. Again I will need more info about that.
Hope this help, but again you may know all this.
I am french myself so if you need any translation for the instruction let me know.
Like your work. Have you build other DJH kits or is it the first one?
Luc