If you have a number of images that are too large to fit on one page in a Microsoft Word document - is there an easier way to embed them into the document than splitting them with an image editor? The width of the images fits on the page, but they are often 2-3 pages high.
Paste them into multiple pages and crop them.
Crop each one from the top by a multiple of the (visible) page length, so crop the second one by (say) 27 cm, the third by 54, etc. You don't say which version of Word you have, but the options for specific crop measurement are in the "size" dialog for the picture (rather than doing this by hand)