The most recent binary build of Wonder frameworks for both WO 5.3.3 and WO 5.4.3 are available
from mDimension's Hudson build server. This installation method gets you the latest version.
However, if you are not afraid of source (and you shouldn't be!), then try the Source installation
and upgrade article instead. Really, working with Wonder source is the recommended way, and you will learn more and be a better WebObjects developer as a result :-)
The objective is to simply download the compressed archive of the Wonder frameeworks, expand the archive and copy the frameworks to the default frameworks location.