Inkin- I know you may already have the answer, but I have my favorite methods to do that this that you may want to try. I either use Microsoft Word (for when I need to print from a different computer) or Inkscape (my #1 favorite)
In MS Word: Open the Image (Do an "insert" then "picture from file", this may have different options depending on what version of MS Office you are using). Once the image is open, double click and resize in this window, or on the image, just click it and scale manually. Most importantly, ***turn off Word Wrap on each image*** then you can put it anywhere on the paper you want.
In Inkscape (my favorite method): This is a free app and mostly popular for creating SVG's, but I love to use it to print digis for the reason that you can put them anywhere on the page. For this, Open Inkscape the do a file-> Open. Your digi will open in another Inkscape Window, you can either manipulate it in this window or if you are adding it to an existing file, just cut it from one the paste it in the other. Click on the image and at the top you can resize it to a specific measurement, or click on a corner to resize. This method is also best for printing multiple digis on one page which I like to do in order not to waste paper. Just "right click" then Duplicate to make an exact copy of the image. Be sure you change the page size in File-> Document Properties to your paper size, and the rectangle you see on the screen is the part of the file that prints so just arrange your digis in that area the way you want them. The reason I like Inkscape is because it's so much easier to print a digi on any size paper!
Hope this helps someone