4
If I"m not mistaken though, I believe the version that wjue has changes the look of squirrel mail (removes some frames or something) to make it work within xoops. From what I saw on the link provided by the original poster, what he is trying to do is maintain the look and feel of squirrel mail, just embed it in xoops.
Personally, Id like to do that with mygroupware, but haven't had the time to look into it.
John