You can change that key in the dx9settings.ini file under , Key.'501' value is second mouse button. I use for aiming 'P' key (lower convergence), because i use Xbox controller (bind to Left trigger with Xpadder). Use this values for Shadows in 'Video.scr': In the Nvidia Thread HERE it's all information (and others mods).
Also if you want you can remove crosshair.
Effects (Smoke, Fire, vapor, others) now in the right depth.originally in 2D. HUD 3D (sadly this game it's a total mess with shaders for this, so HUD and Crosshair are in the same depth). The engine used in this game it's a total mess for 3D, so i did the best I could.
