You are not going to get precise instructions, but a way forward is a template containing a userform from which to make the selections
http://www.gmayor.com/Userform.htm &
http://www.gmayor.com/SelectFile.htm and then insert the required information in the document (directly or by using building blocks) either sequentially, or at bookmarked locations or by using docvariables and their associated fields.
Once you understand the principles, you can get more adventurous -
http://gregmaxey.com/Create_and_employ_a_UserForm.htm