How to import folder structure with lots of subfolders (path too long)

Tendering or Contract partners will quite often supply us with (cd or usb-sticks with) documents in a complicated structure of folders and subfolders, using long names for folders and documents. Thus exceeding the limited Windows path of +- 255 characters.

When trying to drag&drop the folder structure in PW this gives errors (and lots of frustration too)

How do others deal with this? Shortening the path name is a very time-consuming labour; besides we usually are not allowed to change document names, that come from the partner's EDM system. We also need to keep the file complete in the structure it is delivered to us.

Any help is appreciated!