I know that to pan the camera you have to press the middle mouse button. Is there any way to pan without the middle mouse button? I can zoom and rotate just fine.
Nope not unless you have some program that make you able to change another button to the middle button
If you download autohotkey the following script should let you use left ctrl+alt to pan with in the level and model editors:
Code:
SetTitleMatchMode RegEx
#IfWinActive .*HPL (Level|Model) Editor
*LCtrl::
SendEvent {Blind}{MButton down}
KeyWait LCtrl
SendEvent {Blind}{MButton up}
return