export to PDF (with spot color) from Indesign CS2

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I want to export my project to PDF directly from Indesign. My project contains a panton (spot), and I don't know what's the right option for colors - in the Advanced pane in the Export to PDF dialogue box- in Indesign CS2. I remember that in CS1 export to pdf it was the LEAVE UNCHANGED option. what's the corresponding option in CS2?

Kinda depends... I use Composite CMYK for my offset PDF workflow.
This will retain your Pantone Spot colors in a Composite Workflow.

..and Composite Leave Unchanged for the Digital Printing work. Reason being - we run RGB images, and Pantone Spot colors to the iGen.
I want them to show at the RIP as RGB and Pantones.
10.3.9 CS2
Hope this helps some.....
Vee