Lid Closed Mode on an 867?

I am surethis has been covered in these forums somewhere, but I must be using the wrong search terms, b/c I can't seem to find a conclusive answer. So here it goes:
Can I run my 12" aluminum 867MHz Powerbook with the lid closed while attached to an external display? Or is that an option only on the newer (newest) PBs? I know iBooks need the keyboard clear to help dissapate heat. Is that an issue with my PB as well?
Thanks!

Hi,
I've been using my 867 Mhz PowerBook with the lid closed and connected to an external display, keyboard, and mouse ever since I bought it in March, 2003. I've had no heat-related problems at all. However, whenever I have a chance, I prop up the back end of the PowerBook on somethat that will raise the rear of the machine off the table about an inch or so to allow for better air circulation underneath it, where it seems to get the hottest. I didn't do this as a response to any problem, but when I realized how warm the underside of the machine gets, I figured it was a prudent thing to do.
Ken

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