Tipster Richard Utt shares a trick that allows users to quickly and easily load LISP routines in AutoCAD.
"This works, as far as I know, with any version of AutoCAD or ADT you're likely to encounter. If you have found a new LISP routine you want to try out, simply open the directory where you've stored the LISP file, then drag it into an open AutoCAD window. The LISP routine will now be available for use during that CAD session only. (This is also useful for a seldom-used, but occasionally valuable LISP routine.)
"Note that this will only load the file for the current session; making it available for all future sessions is a different story."
Notes from Cadalyst tip reviewer Brian Benton: You can load almost anything into an open AutoCAD file this way. Drag and drop a DWG file to insert it as a block, or drag and drop a LISP file, a script file, etc. and it will load right into the open file.