TMP Files issue in Word on Shared Secure Network Drive

I have a client that is creating Word Documents that have pictures inserted into them and then saving these documents to a shared file on their server.  The shared folder is set to allow them to read the contents and write to it but they do not want anyone to modify the documents or delete the documents.  I got that part working just fine other than when they save the word documents directly into this folder it also creates several *.tmp files out there.  Everytime they open and view the document it creates a *.tmp file.  Is there a way to redirect where the *.tmp files are created or not created at all.   This is perplexing me and getting quite frustrating and I figure that someone out here knows the answer.