How to add AWTpermission to a signed applet?

Hi

I have a signed applet in which i open a jpopupmenu, but when i hover the mouse onto the menu, i get a warning symbol.
My applet is signed and the signature is valid. I think the signing the applet will not achieve AWTPERMISSION. So, i want to add a "showWindowWithoutWarningBanner" AWT Permission.
How can i do this?I donot want to edit the java.policy file manually as this applet has to be loaded on to N number of machines accessing the application.

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