Solved: Pisnes gamepad or keyboard control only after plugging in a mouse

[IriDium]

1) Have you tried the addon ROM Browser - I believe it was written to directly support some games within XBMC
2) You may be better suited to having Rasbian with Xbian rather that native Xbian - which was designed to be a Media Player rather than a mix and match - See http://forum.xbian.org/thread-1850-post-18439.html?highlight=raspbian#pid18439

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Not related - but I would check your PSU - 4.8V may not be enough in some cases (5.1V is the preferred supply)