Don't you mean word documents to bitmap files? I wouldn't think you could format if you made them word docutments... though I'll assume you do mean that
Just open word, and go to Insert, Picture... From file and find it and press okay, which will insert it into a word document.
If you mean to get it out of the word document and into Paint or something, simply right click the image while in Word, and go to Copy. Go to a Paint program (e.g Photoshop) and paste the image by going to Edit, Paste.
Hope this helps