MSDOS-related changes.

INSTALL

@@ -600,12 +600,7 @@ To unpack Emacs with djtar, type this command:
     djtar -x emacs.tgz
 
 (This assumes that the Emacs distribution is called `emacs.tgz' on
-your system.)  There are a few files in the archive whose names
-collide with other files under the 8.3 DOS naming.  On native MSDOS,
-or if you have set LFN=n on Windows 95, djtar will ask you to supply
-alternate names for these files; you can just press `Enter' when this
-happens (which makes djtar skip these files) because they aren't
-required for MS-DOS.
+your system.)
 
 When unpacking is done, a directory called `emacs-XX.YY' will be
 created, where XX.YY is the Emacs version.  To build and install
@@ -628,8 +623,9 @@ if you run Emacs under MS Windows.
 Emacs on MSDOS finds the lisp, etc and info directories by looking in
 ../lisp, ../etc and ../info, starting from the directory where the
 Emacs executable was run from.  You can override this by setting the
-environment variable HOME; if you do that, the directories lisp, etc
-and info are accessed as subdirectories of the HOME directory.
+environment variables EMACSDATA (for the location of `etc' directory),
+EMACSLOADPATH (for the location of `lisp' directory) and INFOPATH (for
+the location of the `info' directory).
 
 MSDOG is a not a multitasking operating system, so Emacs features such
 as asynchronous subprocesses that depend on multitasking will not