The answer to both question is "yes." In Adobe Acrobat or the Adobe Reader, click on "File", then "Preferences", then "General". In the Options section at the bottom of the window labeled "General Preferences," check the box (by clicking on it if it is blank) beside "Web Browser Integration" to make a PDF document open within the browser. Uncheck that box (by clicking on it if it is checked) to cause Acrobat or the Adobe Reader to open in a separate window.