Hi Dave
When you export an EPS, this file will use the original colours configured in the map file. The course overprint will use the colour configured in Condes, and it will - if the standard overprint color is used - be converted to 100% Magenta, 20% Cyan.
The Postscript options will not have any effect, i.e. the simulated overprint will not be produced.
The EPS file will have the "overprint" indicators for those colour layers (including the course overprint layer) which has been indicated in the OCAD colour table with a checkmark in the O column.
When you print from AI, make sure to select "View" / "Overprint preview" to get the overprint effect.
Best regards,
Finn