When you install Acrobat (at least in v.4 which I have) it will install two printers - PDF Writer and Acrobat Distiller. You choose them from inside the application and configure like any other printers. PDF Writer is more straightforward. If it gives you problems, try Distiller. Distiller can also act independantly and convert postscript (.ps) to .pdf, although I've never used it this way.

Once you've got your .pdf of the graphic you can insert it as a whole page into another .pdf document.
HTH.

-Zeke