wsusoffline

but in the state it is now, it has to be in the folders as it is, otherwise it can not be moved an copied from one place to other. All path are fixed relativ and the structure is mandatory.
If you look at the structure of the folders, you will notice , that the author had something special here in mind. The idea was to be able simply separate the actual client with all the subfolders, from the 'creator' which is in the more upper folder level. By that, some solfcontained updater disks can be created in rather simple way, it was designed for general public use originally.
The scripts are changing frequently, every few weeks new versions have to be published. It is a project which is by half the world probably more known as ctupdate, originally published by the CT magazine.
Since the scripts have to be corrected for this and that file on some microsoft servers, the frequent change is needed, older versions will not work anyway or will collect not all updates or will produce errors not finding some repository servers etc.

So the best thing how to use it is to download the just recent version from authors website, launch it the way he did design it and do your updates this way.
With such complex thing, I would be reluctant to make some changes to the scripts, you may soon end up loading wrong things from microsoft and updating with who knows what.