diff --git a/mozilla/mail/locales/en-US/installer/custom.properties b/mozilla/mail/locales/en-US/installer/custom.properties
index 572a6380519..62167c35c60 100755
--- a/mozilla/mail/locales/en-US/installer/custom.properties
+++ b/mozilla/mail/locales/en-US/installer/custom.properties
@@ -46,9 +46,14 @@
 # You can use \n to create a newline in the string but only when the string
 # from en-US contains a \n.
 
+OPTIONAL_COMPONENTS_TITLE=Choose Optional Components
+OPTIONAL_COMPONENTS_SUBTITLE=Choose which features of $(^NameDA) you want to install.
+OPTIONAL_COMPONENTS_LABEL=Optional Components:
 APP_DESC=Required files for the ${BrandShortName} application
-DEV_TOOLS_DESC=A tool for inspecting the DOM of HTML, XUL, and XML pages, including the application's chrome.
-QFA_DESC=A tool for submitting crash reports to Mozilla.org.
+DOMI_TITLE=DOM Inspector
+DOMI_TEXT=Inspects the structure and properties of a window and its contents.
+QFA_TITLE=Quality Feedback Agent
+QFA_TEXT=Sends information about program crashes to Mozilla.
 OPTIONS=$(^NameDA) &Options
 SAFE_MODE=Safe Mode
 OPTIONS_PAGE_TITLE=Setup Type
@@ -63,6 +68,8 @@ CREATE_ICONS_DESC=Create icons for ${BrandShortName}:
 ICONS_DESKTOP=On my &Desktop
 ICONS_STARTMENU=In my &Start Menu Programs folder
 ICONS_QUICKLAUNCH=In my &Quick Launch bar
+WARN_WRITE_ACCESS=You don't have access to write to the installation directory.\n\nClick OK to select a different directory.
+WARN_DISK_SPACE=You don't have sufficient disk space to install to this location.\n\nClick OK to select a different location.
 
 STATUS_INSTALL_APP=Installing ${BrandShortName}...
 STATUS_INSTALL_LANG=Installing Language Files (${AB_CD})...