need software for HTC touch diamond to lock screen during incoming call?

[metalmilitia_989]

im using htc touch diamond..

looking for a freeware that can lock the screen when there is an incoming call,NOT during a call..

sometimes i accidentally hit the answer or deny key on the screen while my phone is in my pocket...

i dont want accidentally answering or denying calls..

just looking for a simple software..

i've tried s2u2 but it seems that 'slide to answer' is not compatible with touch diamond....i'm not gonna use that again

any suggestions?