rservice wrote on Dec 4^th, 2009 at 9:46pm:

Whats the procedure for installing 4.4?Should the existing 757 be uninstalled,and how does this affect the freight version.I seem to have problems with the IRS 's now i.e., there is no action when I try to set the switches?  :-/

You need to delete all previously installed versions of the Captain Sim 757 before installing this update.  Install the base pack first, than move on to the expansion packs.