Index: boot/bootdata/hivecls_amd64.inf
===================================================================
--- boot/bootdata/hivecls_amd64.inf	(revision 57911)
+++ boot/bootdata/hivecls_amd64.inf	(working copy)
@@ -268,6 +268,18 @@
 HKCR,"SoundRec\DefaultIcon","",0x00020000,"%SystemRoot%\system32\shell32.dll,-225"
 HKCR,"SoundRec\shell\open\command","",0x00020000,"%SystemRoot%\system32\mplay32.exe %1"
 
+; MS Styles (Themes)
+HKCR,".msstyles","",0x00000000,"msstylesfile"
+HKCR,"msstylesfile","",0x00000000,"Visual Style File"
+HKCR,"msstylesfile\DefaultIcon","0x00020000","%SystemRoot%\system32\themeui.dll,-1"
+HKCR,"msstylesfile\shell\open\command","",0x00000000,"rundll32.exe shell32.dll,ControlRunDLL desk.cpl desk,@Appearance /Action:OpenMSTheme /file:""%1"""
+
+; Theme File
+HKCR,".theme","",0x00000000,"themefile"
+HKCR,"themefile","",0x00000000,"Theme File"
+HKCR,"themefile\DefaultIcon","0x00020000","%SystemRoot%\system32\themeui.dll,-1"
+HKCR,"themefile\shell\open\command","",0x00000000,"rundll32.exe shell32.dll,ControlRunDLL desk.cpl desk,@Appearance /Action:OpenTheme /file:""%1"""
+
 ; Midi Sounds
 HKCR,".mid","",0x00000000,"MIDFile"
 HKCR,".midi","",0x00000000,"MIDFile"
Index: boot/bootdata/hivecls_arm.inf
===================================================================
--- boot/bootdata/hivecls_arm.inf	(revision 57911)
+++ boot/bootdata/hivecls_arm.inf	(working copy)
@@ -272,6 +272,18 @@
 HKCR,"SoundRec\DefaultIcon","",0x00020000,"%SystemRoot%\system32\shell32.dll,-225"
 HKCR,"SoundRec\shell\open\command","",0x00020000,"%SystemRoot%\system32\mplay32.exe %1"
 
+; MS Styles (Themes)
+HKCR,".msstyles","",0x00000000,"msstylesfile"
+HKCR,"msstylesfile","",0x00000000,"Visual Style File"
+HKCR,"msstylesfile\DefaultIcon","0x00020000","%SystemRoot%\system32\themeui.dll,-1"
+HKCR,"msstylesfile\shell\open\command","",0x00000000,"rundll32.exe shell32.dll,ControlRunDLL desk.cpl desk,@Appearance /Action:OpenMSTheme /file:""%1"""
+
+; Theme File
+HKCR,".theme","",0x00000000,"themefile"
+HKCR,"themefile","",0x00000000,"Theme File"
+HKCR,"themefile\DefaultIcon","0x00020000","%SystemRoot%\system32\themeui.dll,-1"
+HKCR,"themefile\shell\open\command","",0x00000000,"rundll32.exe shell32.dll,ControlRunDLL desk.cpl desk,@Appearance /Action:OpenTheme /file:""%1"""
+
 ; Midi Sounds
 HKCR,".mid","",0x00000000,"MIDFile"
 HKCR,".midi","",0x00000000,"MIDFile"
Index: boot/bootdata/hivecls_i386.inf
===================================================================
--- boot/bootdata/hivecls_i386.inf	(revision 57911)
+++ boot/bootdata/hivecls_i386.inf	(working copy)
@@ -260,6 +260,18 @@
 HKCR,"SoundRec\DefaultIcon","",0x00020000,"%SystemRoot%\system32\shell32.dll,-225"
 HKCR,"SoundRec\shell\open\command","",0x00020000,"%SystemRoot%\system32\mplay32.exe %1"
 
+; MS Styles (Themes)
+HKCR,".msstyles","",0x00000000,"msstylesfile"
+HKCR,"msstylesfile","",0x00000000,"Visual Style File"
+HKCR,"msstylesfile\DefaultIcon","0x00020000","%SystemRoot%\system32\themeui.dll,-1"
+HKCR,"msstylesfile\shell\open\command","",0x00000000,"rundll32.exe shell32.dll,ControlRunDLL desk.cpl desk,@Appearance /Action:OpenMSTheme /file:""%1"""
+
+; Theme File
+HKCR,".theme","",0x00000000,"themefile"
+HKCR,"themefile","",0x00000000,"Theme File"
+HKCR,"themefile\DefaultIcon","0x00020000","%SystemRoot%\system32\themeui.dll,-1"
+HKCR,"themefile\shell\open\command","",0x00000000,"rundll32.exe shell32.dll,ControlRunDLL desk.cpl desk,@Appearance /Action:OpenTheme /file:""%1"""
+
 ; Midi Sounds
 HKCR,".mid","",0x00000000,"MIDFile"
 HKCR,".midi","",0x00000000,"MIDFile"