Does the 11x17 page contain two pages side by side, and you now want individual pages?
If not, then you should have no problem setting the print dialog to "scale to fit", and it would automagically scale the 11x17 page to the available printing area of the selected printer.
If it does, and you need to split the pages, the question is whether you have Acrobat (Pro or Standard; but not Reader) installed. If so, you could, for example do this:
• open the document in Acrobat
• select the Crop Tool
• crop all pages so that the left half remains visible
• print
• release the cropping and recrop, so that the right half remains visible
• print
• release the cropping
• manually assemble your document by taking a page from the second print job, then a page from the first print job and so on.
I think that would be the fastest and easiest way to do it.
Hope this can help.