LispWorks requires about 30MB for 32-bit and 50MB for 64-bit to install without documentation and optional modules. Installing the documentation adds about 110MB and the optional modules about 15MB. A full installation of the 64-bit Enterprise Edition with all documentation and optional modules requires about 175MB.
The Professional/Enterprise documentation includes printable PDF format manuals. You may delete any of these that you do not need. They are available at
www.lispworks.com/documentation
in any case, and the same manuals are also available there in PostScript format.