Muting Alarms during calls

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Is there a hack or small program that will mute or give a small tone on incoming alarms..sms..v/m ...when u are talking on the phone...?

i hate when i am in a conversation and have alarms going off on the phone..

i know phonealarm application has an option to do that ... but i didnt want to install such a heavy featured program just for that one option

sprint htc touch pro

nothing on this...???