Default Control Scheme for
devlkore's QuakeX Custom.cfg v1.0

Left Thumbstick - Walk/Strafe
Right Thumbstick - Look/Turn (Up/down inverted)

Left Trigger - Jump
Right Trigger - Shoot/Attack

DPad:
Left/Right - Previous/Next Weapon
Up/Down - Zoom In/Out (Two levels of zoom)

A - Throws flares in Alien Quake, Passes turn in Minion, Adds Teammate in Quake 1 Arena
B - View Menu in Minion, Adds Enemy in Quake 1 Arena
X - Select strongest weapon (with ammo available)
Y - Switch between 1st and 3rd person view

BACK - Menu
START - Pause


These controls can all be changed to suit your play style, read the comments in custom.cfg
As far as I know, Black, White and the thumbstick buttons aren't mappable.