lol

did you want so long answer so lang your question?
neither i have time to write down, edit and publish local newspaper, nor much wish in that.
The versions 4?.? are published in 2004 year (number 4) where it is declared that developement is stopped through issues widely discussed before. Any archeologist may download old forum archive to research it.
The ?.? means that this version will not be described widely.
The fact of that it is uploaded means injection will be not worse if you download it, because some issues may be fixed.
the name in brackets (ZD), (Angelo) etc means for whom extended functionality was developed. For example 4ZD version contains fixes for uo.Trade* functions. All changes cumulative.
Resume. You may look at 4?.? versions as last published and described versions 312.*