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diff --git a/materialsystem/stdshaders/shader_constant_register_map.h b/materialsystem/stdshaders/shader_constant_register_map.h
new file mode 100644
index 0000000..ef1d9df
--- /dev/null
+++ b/materialsystem/stdshaders/shader_constant_register_map.h
@@ -0,0 +1,81 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Provide convenient mapping for shader constants
+//
+// $NoKeywords: $
+//=============================================================================
+
+#ifndef C_CODE_HACK
+#include "common_vertexlitgeneric_dx9.h"
+#endif
+
+#define PSREG_SELFILLUMTINT						PSREG_CONSTANT_00
+#define PSREG_DIFFUSE_MODULATION				PSREG_CONSTANT_01
+#define PSREG_ENVMAP_TINT__SHADOW_TWEAKS		PSREG_CONSTANT_02
+#define PSREG_SELFILLUM_SCALE_BIAS_EXP			PSREG_CONSTANT_03
+#define PSREG_AMBIENT_CUBE						PSREG_CONSTANT_04
+//		PSREG_AMBIENT_CUBE						PSREG_CONSTANT_05
+//		PSREG_AMBIENT_CUBE						PSREG_CONSTANT_06
+//		PSREG_AMBIENT_CUBE						PSREG_CONSTANT_07
+//		PSREG_AMBIENT_CUBE						PSREG_CONSTANT_08
+//		PSREG_AMBIENT_CUBE						PSREG_CONSTANT_09
+#define PSREG_ENVMAP_FRESNEL__SELFILLUMMASK		PSREG_CONSTANT_10
+#define PSREG_EYEPOS_SPEC_EXPONENT				PSREG_CONSTANT_11
+#define PSREG_FOG_PARAMS						PSREG_CONSTANT_12
+#define PSREG_FLASHLIGHT_ATTENUATION			PSREG_CONSTANT_13
+#define PSREG_FLASHLIGHT_POSITION_RIM_BOOST		PSREG_CONSTANT_14
+#define PSREG_FLASHLIGHT_TO_WORLD_TEXTURE		PSREG_CONSTANT_15
+//		PSREG_FLASHLIGHT_TO_WORLD_TEXTURE		PSREG_CONSTANT_16
+//		PSREG_FLASHLIGHT_TO_WORLD_TEXTURE		PSREG_CONSTANT_17
+//		PSREG_FLASHLIGHT_TO_WORLD_TEXTURE		PSREG_CONSTANT_18
+#define PSREG_FRESNEL_SPEC_PARAMS				PSREG_CONSTANT_19
+#define PSREG_LIGHT_INFO_ARRAY					PSREG_CONSTANT_20
+//		PSREG_LIGHT_INFO_ARRAY					PSREG_CONSTANT_21
+//		PSREG_LIGHT_INFO_ARRAY					PSREG_CONSTANT_22
+//		PSREG_LIGHT_INFO_ARRAY					PSREG_CONSTANT_23
+//		PSREG_LIGHT_INFO_ARRAY					PSREG_CONSTANT_24
+//		PSREG_LIGHT_INFO_ARRAY					PSREG_CONSTANT_25
+#define PSREG_SPEC_RIM_PARAMS					PSREG_CONSTANT_26
+// #define **free**								PSREG_CONSTANT_27	//actually using this often blows constant limits, since literals have to get stuffed somewhere...
+#define	PSREG_FLASHLIGHT_COLOR					PSREG_CONSTANT_28
+#define	PSREG_LINEAR_FOG_COLOR					PSREG_CONSTANT_29
+#define	PSREG_LIGHT_SCALE						PSREG_CONSTANT_30
+#define	PSREG_FLASHLIGHT_SCREEN_SCALE			PSREG_CONSTANT_31
+//  --- End of ps_2_0 and ps_2_b constants ---
+
+
+#ifndef C_CODE_HACK
+//for fxc code, map the constants to register names.
+#define PSREG_CONSTANT_00	c0
+#define PSREG_CONSTANT_01	c1
+#define PSREG_CONSTANT_02	c2
+#define PSREG_CONSTANT_03	c3
+#define PSREG_CONSTANT_04	c4
+#define PSREG_CONSTANT_05	c5
+#define PSREG_CONSTANT_06	c6
+#define PSREG_CONSTANT_07	c7
+#define PSREG_CONSTANT_08	c8
+#define PSREG_CONSTANT_09	c9
+#define PSREG_CONSTANT_10	c10
+#define PSREG_CONSTANT_11	c11
+#define PSREG_CONSTANT_12	c12
+#define PSREG_CONSTANT_13	c13
+#define PSREG_CONSTANT_14	c14
+#define PSREG_CONSTANT_15	c15
+#define PSREG_CONSTANT_16	c16
+#define PSREG_CONSTANT_17	c17
+#define PSREG_CONSTANT_18	c18
+#define PSREG_CONSTANT_19	c19
+#define PSREG_CONSTANT_20	c20
+#define PSREG_CONSTANT_21	c21
+#define PSREG_CONSTANT_22	c22
+#define PSREG_CONSTANT_23	c23
+#define PSREG_CONSTANT_24	c24
+#define PSREG_CONSTANT_25	c25
+#define PSREG_CONSTANT_26	c26
+#define PSREG_CONSTANT_27	c27
+#define PSREG_CONSTANT_28	c28
+#define PSREG_CONSTANT_29	c29
+#define PSREG_CONSTANT_30	c30
+#define PSREG_CONSTANT_31	c31
+#endif