What is an appropriate Trinity method way to invoke sleep/suspend-
to-ram on a laptop?

Through the system acpi, the laptop already suspends when I close 
the lid. I have a Thinkpad T400 and I would like to assign the Fn-
F4 keys to invoke sleep/suspend without closing the lid and to 
resume. I don't see a way to do that in klaptop.

Thanks.

Darrell