Entourage - keyboard shortcut for applescripts

I’ve added some applescripts to Entourage (Office 2004) via the Script Menu Items folder.

I know that I can add a menu shortcut by appending the script’s title with something
like “\cO” for control-O.

My question is what do I append for a keyboard equivalent of return or
tab or delete?

I’m also aware that whatever I use will override other existing
keyboard equivalents.

Any help is appreciated. Thanks.