Hello,Im new here and im here for one reason:I have a .dwf file of my future house and because im having some issues with the person who made the prints i wish to know if someone can help me to print this in a 1:100 scale and also if its possivle to change this file (some walls in the interior) so i can give it to a decorator. Thanks in advance.

If you want it at 1:100 why don't you send it to a printing company in your local area. They should be able to re-scle it for you. You won't be able to make changes to the drawing though as a dwf is a bit like a pdf. You'll need the original cad drawing to move walls etc or you could get the print and tipex the walls out you don't want and draw the new ones in by hand.