Converting text to curves

[Zakiyya]

Hi There

Please see the attached advert.
1. The printers have said the text needs to be converted to curves. How do I go about doing this?
2. The black used on the advert has to be CMYK. When I change the black to CMYK, the images which have a black background stand out out on the background instead of fitting in seamlessly, once converted to a PDF. How do I overcome this.

I am using Xara Page and Layout Designer 9