insert_nick, I just did this:

http://www.google.co.uk/search?hl=en...DECREASE&meta=

clicked on first link

I see #define HILDON_HARDKEY_UP GDK_Up

So do this
http://www.google.co.uk/search?hl=en...UK%7CcountryGB

And you see in the first link without even visiting it

#define GDK_Up 0xFF52

Also check out http://www.gvu.gatech.edu/ccg/people...k/gdkkeysyms.h seems to have the 073 for s in it as well as a full list
I'd suggest trying that?
...so try that perhaps?

sdlmapkey 0xFF52,0x000f