Index: Makefile
===================================================================
--- Makefile	(revision 5023)
+++ Makefile	(working copy)
@@ -1,11 +1,15 @@
-subdir = contrib/admin81
-top_builddir = ../..
-include $(top_builddir)/src/Makefile.global
-
 MODULE_big = admin81
 PG_CPPFLAGS = -I$(libpq_srcdir)
 DATA_built = admin81.sql
 DOCS = README.admin81
 OBJS = admin81.o
 
+ifdef USE_PGXS
+PGXS := $(shell pg_config --pgxs)
+include $(PGXS)
+else
+subdir = contrib/admin81
+top_builddir = ../..
+include $(top_builddir)/src/Makefile.global
 include $(top_srcdir)/contrib/contrib-global.mk
+endif
Index: README.admin81
===================================================================
--- README.admin81	(revision 5023)
+++ README.admin81	(working copy)
@@ -11,11 +11,18 @@
 ============
 
 You will need a PostgreSQL source tree which has been properly configured
-for the local system using the 'configure' script.
+for the local system using the 'configure' script, or you can use PGXS 
+which does not require the full source tree. 
 
-Copy this directory into the /contrib directory of the PostgreSQL source tree,
-and then run the following commands as a users with appropriate privileges:
+To install using PGXS simply run the following commands in this directory:
 
+make USE_PGXS=1 
+make USE_PGXS=1 install 
+
+Otherwise, copy this directory into the /contrib directory of the PostgreSQL 
+source tree, and then run the following commands as a user with appropriate 
+privileges:
+
 make
 make install