[NTG-context] fullpage graphic

Hallo! I can not find a solution for the following problem: I would like to place a floating, framed graphic at the next page following the \placefigure[]{}{\framed[]{...}} command. Problem: The graphicdimensions are (\makeupwidth,\textheight). Neither the options page, here, force or always help. If the graphic is a little smaller, so that at least one line of text fit on the page, than the graphic gets placed at the right page, else the graphic is placed behind the end of the chapter. Second question: How can I place a fullpage graphic (\paperheight+epsilon,\paperwidth+epsilon) as above at the next page, and how can I count, but don't display pagenumbers for such graphic pages? Wolfgang