Ascii Pfile mod version 2.0b installation instructions:

These instructions assume you're using circle 3.0 patch level 13a.  If
you're using the original 13, it should work with no problems.  All
earlier versions will have to be hand patched and may take a little coding
skill.

BEFORE ISTALLING ANY OF THIS, MAKE A BACKUP OF YOUR MUD!

First, move ascii2.patch to your top circle directory (the one with
configure in it).  If you're converting from binary pfiles, you should
also copy install_ascii to this directory.  If you're already using an
older version of ascii pfiles, move rebuild_index to your lib directory.

Change to the top circle directory.  If converting from binary, type
'install_ascii' to create the new pfile directories and install the source
patch.  If converting from older ascii pfiles, type 'patch <
ascii2.patch', then change to the lib directory and type 'rebuild_index'.

Check the new source for any options or changes you need.  The file
ascii2.doc explains your options and what you might want or need to
change about how the system works.

Return to the top directory and run configure.  Then go back to the src
directory and type 'make all'.  If all goes well, there should be no
errors or warnings.  If there are any problems, check the src directory
for *.rej files, which indicate parts of the patch that couldn't be
installed (and will have to be hand-patched).

If everything compiles fine, and you're converting from binary, change to
the lib directory and type '../bin/plrtoascii etc/players'.  This will
build the new ascii pfiles.

Run your mud in the usual way and give it a try.
