diff --git a/engine/client/s_load.c b/engine/client/s_load.c
index cb4573bf..e319da39 100644
--- a/engine/client/s_load.c
+++ b/engine/client/s_load.c
@@ -20,7 +20,11 @@ GNU General Public License for more details.
 // than could actually be referenced during gameplay,
 // because we don't want to free anything until we are
 // sure we won't need it.
+#if XASH_PSP
+#define MAX_SFX		2048
+#else
 #define MAX_SFX		8192
+#endif
 #define MAX_SFX_HASH	(MAX_SFX/4)
 
 static int	s_numSfx = 0;
diff --git a/engine/client/sound.h b/engine/client/sound.h
index fba869f7..09f75213 100644
--- a/engine/client/sound.h
+++ b/engine/client/sound.h
@@ -201,8 +201,13 @@ typedef struct
 
 //====================================================================
 
+#if XASH_PSP
+#define MAX_DYNAMIC_CHANNELS	(20 + NUM_AMBIENTS)
+#define MAX_CHANNELS	(128 + MAX_DYNAMIC_CHANNELS)
+#else
 #define MAX_DYNAMIC_CHANNELS	(60 + NUM_AMBIENTS)
 #define MAX_CHANNELS	(256 + MAX_DYNAMIC_CHANNELS)	// Scourge Of Armagon has too many static sounds on hip2m4.bsp
+#endif
 #define MAX_RAW_CHANNELS	16
 #define MAX_RAW_SAMPLES	8192
 
diff --git a/ref_gu/gu_local.h b/ref_gu/gu_local.h
index 28f09ddd..200282b8 100644
--- a/ref_gu/gu_local.h
+++ b/ref_gu/gu_local.h
@@ -67,7 +67,7 @@ GNU General Public License for more details.
 
 extern byte	*r_temppool;
 
-#define LIGHTMAP_BPP	2 //1 2 3 4
+#define LIGHTMAP_BPP	1 //1 2 3 4
 
 #if LIGHTMAP_BPP == 1
 #define LIGHTMAP_FORMAT	PF_RGB_332