Filter for laptop screen?

I'd like to use a timing process program like this:
Time It Software
in my darkrom, but I can't find a source (locally) for a filter... anybody use an LCD screen in their darkroom & have a suggestion?

John '

I've just been draping a darkcloth over my laptop when I need it in the darkroom.

Check out the Comp N Temp software, which looks to be a very attractive compensating timer program (to use it that way, you need a USB temperature probe that you purchase separately), and Curt Palm, the designer, is an APUG advertiser--

(there was a url link here which no longer exists)

He has some suggestions for safelight filters for laptop screens on the website, and is generally a very helpful person. I asked how well the software performed with the probe rubber banded to a stainless steel tank, and he actually ran a test and gave me the results (which were that it's probably not accurate enough that way).