If it's a low-hanging fruit, this will work: http://thp.io/2012/maemo/camerra_1.0...camkeyonly.deb (source patch here, but people like binary packages more these days for some strange reason.. and yes, this Python package isn't really "binary", but you get the idea - people want their cake only - and possibly eat it - not the recipe for it.. or something)

If that doesn't work, then you can surely get it to work through some other means, but I won't be modifying my app more than that