I got the logitech cordless click plus working (well, I mean the wheel, the side buttons and the top button work — don’t know what you mean with “tilt wheel”).

The side buttons deliver Button 6 and 7 events, the top gives Button 8 (and the wheel 4 and 5), without extra xmodmap mappings.

I use

Section “InputDevice”
Identifier “Configured Mouse”
Driver “mouse”
Option “CorePointer”
Option “Protocol” “evdev”
Option “Dev Name” “Logitech USB Receiver”
Option “Dev Phys”
Option “Device”
Option “Buttons” “8”
Option “ZAxisMapping” “4 5”
EndSection

The trick seems to be to leave “dev phys” and “device” without parameter. For “dev name” I copied the name from “cat /proc/bus/input/devices” (don’t know if it is important).

I have a 2.6.8 kernel with evdev compiled in (CONFIG_INPUT_EVDEV=y) and xfree version 4.3.0.1 (Debian 4.3.0.dfsg.1-14 20050601214810)