It seems to me your FREMANTLE target does not have pymaemo installed, otherwise your LOCATE command should list something in the way of:

/scratchbox/users/maemo/targets/FREMANTLE_X86/usr/lib/pythonx.x/site-packages/gtk-2.0/gtk/glade.so,

where x.x is the current python version for fremantle, I'm at work so I cannot verify which is the actual version deployed with FREMANTLE. Any other mymaemo installs, like the ones your locate is listing, are absolutely opaque to the actual target where you are developing.

So I suppose you should install pymaemo in your FREMANTLE_X86 target, as stated here:

http://pymaemo.garage.maemo.org/sdk_...html#fremantle

Good Luck.