diff -ur linux-2.6.2-rc2-mm2.orig/drivers/usb/input/hid-core.c linux-2.6.2-rc2-mm2/drivers/usb/input/hid-core.c
--- linux-2.6.2-rc2-mm2.orig/drivers/usb/input/hid-core.c	2004-01-30 06:10:39.000000000 -0500
+++ linux-2.6.2-rc2-mm2/drivers/usb/input/hid-core.c	2004-01-30 06:35:21.000000000 -0500
@@ -1425,8 +1425,8 @@
 	{ USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVMC, HID_QUIRK_NOGET },
 	{ USB_VENDOR_ID_TANGTOP, USB_DEVICE_ID_TANGTOP_USBPS2, HID_QUIRK_NOGET },
 
-	{ USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU, HID_QUIRK_2WHEEL_MOUSE_HACK },
-	{ USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE, HID_QUIRK_2WHEEL_MOUSE_HACK },
+	{ USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU, HID_QUIRK_2WHEEL_MOUSE_HACK_BACK },
+	{ USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE, HID_QUIRK_2WHEEL_MOUSE_HACK_EXTRA },
 
 	{ USB_VENDOR_ID_ALPS, USB_DEVICE_ID_IBM_GAMEPAD, HID_QUIRK_BADPAD },
 	{ USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_DRIVING, HID_QUIRK_BADPAD | HID_QUIRK_MULTI_INPUT },
diff -ur linux-2.6.2-rc2-mm2.orig/drivers/usb/input/hid-input.c linux-2.6.2-rc2-mm2/drivers/usb/input/hid-input.c
--- linux-2.6.2-rc2-mm2.orig/drivers/usb/input/hid-input.c	2004-01-30 06:10:39.000000000 -0500
+++ linux-2.6.2-rc2-mm2/drivers/usb/input/hid-input.c	2004-01-30 06:38:45.000000000 -0500
@@ -377,7 +377,8 @@
 
 	set_bit(usage->type, input->evbit);
 	if ((usage->type == EV_REL)
-			&& (device->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK)
+			&& (device->quirks & (HID_QUIRK_2WHEEL_MOUSE_HACK_BACK
+				| HID_QUIRK_2WHEEL_MOUSE_HACK_EXTRA))
 			&& (usage->code == REL_WHEEL)) {
 		set_bit(REL_HWHEEL, bit);
 	}
@@ -431,8 +432,8 @@
 
 	input_regs(input, regs);
 
-	if ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK)
-			&& (usage->code == BTN_BACK || usage->code == BTN_EXTRA)) {
+	if (((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_EXTRA) && (usage->code == BTN_EXTRA))
+		|| (hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_BACK) && (usage->code == BTN_BACK)) {
 		if (value)
 			hid->quirks |= HID_QUIRK_2WHEEL_MOUSE_HACK_ON;
 		else
diff -ur linux-2.6.2-rc2-mm2.orig/drivers/usb/input/hid.h linux-2.6.2-rc2-mm2/drivers/usb/input/hid.h
--- linux-2.6.2-rc2-mm2.orig/drivers/usb/input/hid.h	2004-01-30 05:54:18.000000000 -0500
+++ linux-2.6.2-rc2-mm2/drivers/usb/input/hid.h	2004-01-30 06:33:54.000000000 -0500
@@ -201,15 +201,16 @@
  * HID device quirks.
  */
 
-#define HID_QUIRK_INVERT		0x001
-#define HID_QUIRK_NOTOUCH		0x002
-#define HID_QUIRK_IGNORE		0x004
-#define HID_QUIRK_NOGET			0x008
-#define HID_QUIRK_HIDDEV		0x010
-#define HID_QUIRK_BADPAD		0x020
-#define HID_QUIRK_MULTI_INPUT		0x040
-#define HID_QUIRK_2WHEEL_MOUSE_HACK	0x080
-#define HID_QUIRK_2WHEEL_MOUSE_HACK_ON	0x100
+#define HID_QUIRK_INVERT			0x001
+#define HID_QUIRK_NOTOUCH			0x002
+#define HID_QUIRK_IGNORE			0x004
+#define HID_QUIRK_NOGET				0x008
+#define HID_QUIRK_HIDDEV			0x010
+#define HID_QUIRK_BADPAD			0x020
+#define HID_QUIRK_MULTI_INPUT			0x040
+#define HID_QUIRK_2WHEEL_MOUSE_HACK_BACK	0x080
+#define HID_QUIRK_2WHEEL_MOUSE_HACK_EXTRA	0x100
+#define HID_QUIRK_2WHEEL_MOUSE_HACK_ON		0x200
 
 /*
  * This is the global environment of the parser. This information is