I do remember downloading ispconfig perfect server setup in pdf sometime back. Now only subscribed user can download, isn't it? Online instruction available in the http://www.ispconfig.org/documentation/ will be same as the downloadable instructions rt?.
The PDF files were always limited to subscribers, they were never available without a subscription. If you refer to the perfect server guides only, then yes. They were always available for free as HTML version at howtoforge and as PDF version for subscribers only. If you refer to the ISPConfig manual, the manual is only available as PDF for subscribers or you can buy a single copy for 5 EUR at ispconfig.org