BF2S Forums Finally have proof you can kill with Grappling Hook

KILLMESSAGE_VEHICLE_a10       A10
KILLMESSAGE_VEHICLE_su39      SU39
KILLMESSAGE_VEHICLE_wz11      WZ11
KILLMESSAGE_VEHICLE_ec635     EC635
KILLMESSAGE_VEHICLE_littlebirdMD530
KILLMESSAGE_VEHICLE_eurofighterEurofighter Typhoon
KILLMESSAGE_VEHICLE_fantan    Fantan Q-5
KILLMESSAGE_VEHICLE_uav       UAV
KILLMESSAGE_VEHICLE_harrier   Harrier GR-7
KILLMESSAGE_VEHICLE_lynx      Lynx AH-7
KILLMESSAGE_VEHICLE_tiger     Tiger HAP
KILLMESSAGE_VEHICLE_challenger2Challenger 2
KILLMESSAGE_VEHICLE_l2a6      L2A6
KILLMESSAGE_VEHICLE_vb1       VB1

This stuff comes from Euro Forces and Armored Fury I think.

There is a lot of stuff in the localization files that never got implemented into the game. Also, there are kill messages listed for any item you can activate/equip via the weapon buttons (1-0), regardless of whether you can actually kill someone with them. Mainly to deal with how road kills are handled, I'd imagine.