The biggest problem War Ace has IMO is distribution.
The main site is pop-up city and to be honest that drives me nuts. File Front is good but they delete files after 30 days of inativity. However on Han's d/l page there are links to one other mirror for full and light version, the updates and the hot fix. Those links point to this page
http://mysh3.info/sh3downloads.html
Note: "WAC downloads can not be put together with downloaded parts from other mirrors.
Note: This is the complete WAC Mod repackaged as two downloads instead of 3 or 4."
These links/pages will be avaiable for a few more months.