Split to fit exact size

So, first a suggestion: there are no forums here for questions regarding the entire creative suite. I’m putting this question in Photoshop, because I threw a dart, basically. This might be a question for Photoshop or it might be for InDesign or Acrobat or Bridge for all I know. so, if you have an answer that includes another product in the suite, please post. I just want to know the best way to do what I need to do.

So here’s what I need: I have a document that is poster size. Let’s say it’s close to 18 x 24. The important part is that it contains a grid, composed of 1“ x 1“ squares. I have a laser printer that prints 8 1/2 x 11” sheets of paper. I want to be able to split to fit my document, at it’s exact size over multiple 8 1/2 x 11 sheets of paper. I feel like there should be some straightforward way to do this with Adobe creative suite. I have never found it. Back in the good old days when I was able to go into work, I always did this with Microsoft publisher, a program I distain normally, but it does this process beautifully with crop marks. Now I’m stuck at home with a Macintosh only household, and publisher is out of the question.

I have found instructions on the Internet to print over multiple pages using acrobat, but it’s kind of a process of playing around with scaling up my print after acrobat has already shrunk it to my printer’s page size. thus, I have no idea at which point I am back to the exact size the document originally was with my 1“ x 1“ grid squares, other than multiple times of trial and error; printing scaling it up slightly each time, and wasting a bunch of toner and print material.

So, how do I do this in Photoshop, Acrobat, InDesign or whatever?