diff --git a/configure/CONFIG b/configure/CONFIG
index b46d386..4e9af40 100644
--- a/configure/CONFIG
+++ b/configure/CONFIG
@@ -1,14 +1,29 @@
-#CONFIG
-include $(TOP)/configure/CONFIG_APP
-# Add any changes to make definitions here
+# CONFIG - Load build configuration data
+#
+# Do not make changes to this file!
 
-#CROSS_COMPILER_TARGET_ARCHS = vxWorks-68040
-#CROSS_COMPILER_TARGET_ARCHS = 
+# Allow user to override where the build rules come from
+RULES = $(EPICS_BASE)
 
-# Use this when your IOC and the host use different paths
-# to access the application. Typically this will be 
-# used with the Microsoft FTP server or with NFS mounts. Use
-# is indicated by failure of the cdCommands script on
-# vxWorks. You must rebuild in the iocBoot directory 
-# before this takes effect.
-#IOCS_APPL_TOP = <the top of the application as seen by the IOC>
+# RELEASE files point to other application tops
+include $(TOP)/configure/RELEASE
+-include $(TOP)/configure/RELEASE.$(EPICS_HOST_ARCH)
+-include $(TOP)/configure/RELEASE.$(EPICS_HOST_ARCH).Common
+ifdef T_A
+-include $(TOP)/configure/RELEASE.Common.$(T_A)
+-include $(TOP)/configure/RELEASE.$(EPICS_HOST_ARCH).$(T_A)
+endif
+
+CONFIG = $(RULES)/configure
+include $(CONFIG)/CONFIG
+
+# Override the Base definition:
+INSTALL_LOCATION = $(TOP)
+
+# CONFIG_SITE files contain other build configuration settings
+include $(TOP)/configure/CONFIG_SITE
+-include $(TOP)/configure/CONFIG_SITE.$(EPICS_HOST_ARCH).Common
+ifdef T_A
+ -include $(TOP)/configure/CONFIG_SITE.Common.$(T_A)
+ -include $(TOP)/configure/CONFIG_SITE.$(EPICS_HOST_ARCH).$(T_A)
+endif
diff --git a/configure/CONFIG_APP b/configure/CONFIG_APP
deleted file mode 100644
index 2d93366..0000000
--- a/configure/CONFIG_APP
+++ /dev/null
@@ -1,26 +0,0 @@
-# CONFIG_APP
-
-include $(TOP)/configure/RELEASE
--include $(TOP)/configure/RELEASE.$(EPICS_HOST_ARCH)
--include $(TOP)/configure/RELEASE.Common.$(T_A)
--include $(TOP)/configure/RELEASE.$(EPICS_HOST_ARCH).$(T_A)
-
-ifneq ($(wildcard $(EPICS_BASE)/configure),)
-CONFIG=$(EPICS_BASE)/configure
-else
-CONFIG=$(EPICS_BASE)/config
-DIRS += config
-endif
-include $(CONFIG)/CONFIG
-
-INSTALL_LOCATION = $(TOP)
-ifdef INSTALL_LOCATION_APP
-INSTALL_LOCATION = $(INSTALL_LOCATION_APP)
-endif
-
-ifdef T_A
--include $(TOP)/configure/O.$(T_A)/CONFIG_APP_INCLUDE
-endif
-
-# dbst based database optimization (default: NO)
-DB_OPT = NO
diff --git a/configure/CONFIG_SITE b/configure/CONFIG_SITE
new file mode 100644
index 0000000..d9fa938
--- /dev/null
+++ b/configure/CONFIG_SITE
@@ -0,0 +1,40 @@
+# CONFIG_SITE
+
+-include $(SUPPORT)/configure/CONFIG_SITE
+
+# Make any application-specific changes to the EPICS build
+#   configuration variables in this file.
+#
+# Host/target specific settings can be specified in files named
+#   CONFIG_SITE.$(EPICS_HOST_ARCH).Common
+#   CONFIG_SITE.Common.$(T_A)
+#   CONFIG_SITE.$(EPICS_HOST_ARCH).$(T_A)
+
+# CHECK_RELEASE controls the consistency checking of the support
+#   applications pointed to by the RELEASE* files.
+# Normally CHECK_RELEASE should be set to YES.
+# Set CHECK_RELEASE to NO to disable checking completely.
+# Set CHECK_RELEASE to WARN to perform consistency checking but
+#   continue building even if conflicts are found.
+CHECK_RELEASE = YES
+
+# Set this when you only want to compile this application
+#   for a subset of the cross-compiled target architectures
+#   that Base is built for.
+#CROSS_COMPILER_TARGET_ARCHS = vxWorks-ppc32
+
+# To install files into a location other than $(TOP) define
+#   INSTALL_LOCATION here.
+#INSTALL_LOCATION=</absolute/path/to/install/top>
+
+# Set this when the IOC and build host use different paths
+#   to the install location. This may be needed to boot from
+#   a Microsoft FTP server say, or on some NFS configurations.
+#IOCS_APPL_TOP = </IOC's/absolute/path/to/install/top>
+
+# These allow developers to override the CONFIG_SITE variable
+# settings without having to modify the configure/CONFIG_SITE
+# file itself.
+-include $(TOP)/../CONFIG_SITE.local
+-include $(TOP)/../configure/CONFIG_SITE.local
+-include $(TOP)/configure/CONFIG_SITE.local
diff --git a/configure/Makefile b/configure/Makefile
index 477cdad..0317746 100644
--- a/configure/Makefile
+++ b/configure/Makefile
@@ -2,7 +2,7 @@
 
 TOP=..
 
-include $(TOP)/configure/CONFIG_APP
+include $(TOP)/configure/CONFIG
 
 # Set the following to NO to disable consistency checking of
 # the support applications defined in $(TOP)/configure/RELEASE