Acrobat 8 - Settings to convert RGB colours to CMYK

Hi,
I create A1 & A0 size maps as adobe pdfs. The mapping software I use will only allow me to select R G B colours which is fine and produces the maps with the exact colours I want. However, when I want to print my pdf maps the large format printers I have access to always want to convert my RGB colours to CMYK which makes the colours dull on the printed map compared to the pdf. Are there any settings that I can alter in Acrobat 8 which will convert the RGB colours to CMYK during the pdf creation process. I will then be able to alter my RGB colours if necessary to get the right end result. I am not super technical so if there is a reasonably simple solution that would be great.
Thank you for any help you may be able to give.
Stephen Kilbee in the UK

I think you will have to copy the watermarks and such to the corresponding folders in AAXI. I do not think that they will migrate in the way that you are thinking. It may take a bit of time to find the appropriate folders and files, but this is likely how I would try it. I was not concerned about it myself and did not try to copy such things.

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