Color printing with Windows XP is pretty straightforward. Always start out by selecting Print from the File menu in your application, and from there, most of windows' applications have the same standard options. Select IACC Color Printer from the Select Printer menu

Then, click on Preferences, and from there select the appropriate tray from the "Source is" under the Paper/Quality Tab (select "Automatically Select" for any sizes, "Manual Feed" for color transparancies). If you are not using special paper select the "Automatically Select" option