Hi Jaloga!
CHANGING ROAD WIDTH
In the file the_skin_by_pongo\ui_nextgen\common\mapconfig

the parameters are changed in the files:
ui_nextgen\common\mapconfig\roads.ini
ui_nextgen\common\mapconfig\roadwidths.ini
ui_nextgen\common\mapconfig\shapelines.ini
ui_nextgen\common\mapconfig\shapetypes.ini
ui_nextgen\common\mapconfig\signs.ini

I changed only roads.ini and roadwidths.ini (by selection for my needs)
P.S. Compare with the original