Andy,
I would suggest the American Flyer Catalog Archives by HSL. The are a featured advertiser and the are closing out all their Lionel/American Flyer Archives on CD. Check out the post above "Closeout of HSL Lionel Digital Archive Products -- 40-50% Off Until September 30th!"
I received this CD a couple weeks ago and it has already paid off for me searching for info.
ARNO