can I run both avast and mcafee safely

I currently am running McAfee virus scan program, can I also run avast 4.5 with it? If so, how should I configure avast to do this.I run outlook express, and I do not use messenger.

This question needs to be directed the avast! 4.x Home/Pro subject forum, but the short answer is that only 1 resident Anti-virus program should be run at one time.

I am sure other contributors will go into more details

thankyou