DxInput
DxInput is a plugin that should work with most Direct Input games and allows for keyboard emulation in cases when the other "higher level" forms of emulation (such as SendKeys or InputKeys actions) have no effect.
You may need to experiment with the "keypress delay" setting in the plugin to find the right delay for your system. There is also an action to temporarily override this setting: DxInput.SetDelay
List of Key Names
(A - Z)
(0 - 9)
(F1 - F15)
Escape
Tab
Space
Equals
BackSpace
Back
LeftBracket
RightBracket
Return
SemiColon
Apostrophe
Grave
LeftAlt
LeftControl
LeftMenu
LeftShift
LeftWindows
RightAlt
RightControl
RightMenu
RightShift
RightWindows
BackSlash
Comma
Period
Slash
Minus
Add
Subtract
Multiply
Divide
Capital
CapsLock
Numlock
Scroll
(NumPad0 - NumPad9)
NumPadPeriod
NumPadStar
NumPadPlus
NumPadMinus
NumPadEquals
NumPadEnter
NumPadComma
NumPadSlash
Decimal
OEM102
Kana
AbntC1
Convert
NoConvert
Yen
AbntC2
Circumflex
At
Colon
Underline
Stop
AX
Unlabeled
Calculator
Mute
PlayPause
NextTrack
PrevTrack
MediaStop
VolumeDown
VolumeUp
WebHome
SysRq
Pause
Home
UpArrow
Up
Prior
PageUp
Left
LeftArrow
Right
RightArrow
End
DownArrow
Down
Next
PageDown
Insert
Delete
Apps
Power
Sleep
Wake
WebSearch
WebFavorites
WebRefresh
WebStop
WebForward
WebBack
MyComputer
Mail
MediaSelect
Kanji