These links should help
http://office.microsoft.com/en-gb/p...omposite-of-your-publication-HP001003578.aspx
http://office.microsoft.com/en-gb/p...a-bleed-for-your-publication-HP010120809.aspx
The first covers the CMYK colour space and also the font embedding (the option to embed them should be in the Graphics and Fonts tab)
The second covers the bleed and crop marks.
These next links also provide a good explanation of what the CMYK colour space, crop marks, bleeds etc mean and, more importantly, how to set Publisher up to use them.
http://www.theonlineprinter.com.au/info/RGBtoCMYK.aspx
http://www.theonlineprinter.com.au/info/Bleeds.aspx
And their tips for using Publisher:
http://www.theonlineprinter.com.au/info/PublisherTips.aspx
The tip about dragging graphical elements off the page slightly to create your bleeds is a useful one, particularly if you don't have an image setter driver on your PC. These usually have additional print sizes like A4.extra, A5.extra, Letter.extra - the extra just means that the paper that's printed on is slightly bigger than the required size. Your crop marks will show where this extra paper should be trimmed off by the printer so the posters arrive at you in their proper size. By extending your graphics outside the page, you create the same effect. Don't forget to do the same if you have a page background that isn't white. For example, if your posters are white text on a blue background, create a blue rectangle graphic and make it slightly bigger than the intended page size. Then place your text and other images over the top of this.
As I recall, creating a PDF from Publisher requires the creation of a Postcript file and then either Acrobat or a PDF conversion plug-in to create the PDF. I'd suggest that you install PDFCreator
http://www.pdfforge.org/pdfcreator which sits as a virtual printer on your PC.
Apart from being able to print or create PDF files from any program (just use the PDFCreator "printer" in your software's printing dialog to do this), it can also handle the embedding of fonts and conversion between different colour spaces. You can also save these options with different profiles, e.g. one for your posters with embedded fonts and CMYK colour, another profile without embedding and RGB for normal printing, and a profile with embedded fonts and RGB for a PDF intended for viewing online. All you need to worry about in Publisher is to allow for the bleeds, and to include the printer marks for cropping, and let PDFCreator do the rest.