Here's a list of the key names you can use when remapping the keys in config.xml:

Symbol Keys Alphabet and Numbers KeyPad, Arrows, and Home/End Pad
Function Keys
 
Key state modifier keys and Misc keys      
BACKSPACE
TAB
CLEAR
RETURN
PAUSE
ESCAPE
SPACE
EXCLAIM
QUOTEDBL
HASH
DOLLAR
AMPERSAND
QUOTE
LEFTPAREN
RIGHTPAREN
ASTERISK
PLUS
COMMA
MINUS
PERIOD
SLASH
COLON
SEMICOLON
LESS
EQUALS
GREATER
QUESTION
AT
LEFTBRACKET
BACKSLASH
RIGHTBRACKET
CARET
UNDERSCORE
BACKQUOTE
0
1
2
3
4
5
6
7
8
9
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
KP0
KP1
KP2
KP3
KP4
KP5
KP6
KP7
KP8
KP9

KP_PERIOD
KP_DIVIDE
KP_MULTIPLY
KP_MINUS
KP_PLUS
KP_ENTER
KP_EQUALS

UP
DOWN
RIGHT
LEFT

INSERT
HOME
END
PAGEUP
PAGEDOWN

 
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
F13
F14
F15
NUMLOCK
CAPSLOCK
SCROLLOCK
RSHIFT
LSHIFT
RCTRL
LCTRL
RALT
LALT
RMETA
LMETA
LSUPER // Left "Windows" key
RSUPER // Right "Windows" key
MODE // "Alt Gr" key
COMPOSE // Multi-key compose key

HELP
PRINT
SYSREQ
BREAK
MENU
POWER // Power Macintosh power key
EURO // Some european keyboards
UNDO // Atari keyboard has Undo

DELETE