McGraw-Hill Multimedia Encyclopedia of Science and Technology version 2.1 There is nothing to crack. You just have to be carefull during the install. Please read everything below. You need it. To use this software you have to burn the CD-ROM image to a CD-ROM with a program like Nero or a freeware like InfraRecorder: http://infrarecorder.sourceforge.net/ Then you have to install the encyclopedia directly from the CD-ROM. It only installs some software not the data itself. To use the encyclopedia you have to run the software with the CD-ROM in the same drive you used during the installation of the software. If you don't like to put a CD-ROM in you drive all the time or you don't have a CD-ROM drive on your laptop you can use a "virtual" CD-ROM drive. Use a software ( freeware ) like MagicDisc: http://www.magiciso.com With this program you can mount an ISO image to a virtual CD-ROM drive on some drive letter of your choice. The encyclopedia will never notice the difference and think you have the physical CD-ROM in a real drive. Just be carefull that you mount it every time to the same drive letter or it will not work. The drive letter is somehow fixed during the installation process so be carfull when you install to use a letter that will certainly stay free like somewhere high up in the alphabet ( like "T:" ). Good Luck!!! This is a briliant Science Encyclopedia and an excellent source to improve Wikipedia. Please help improve Wikipedia. Thanks. This file and the folder "Scanned Documents" are not part of the original CD-ROM but were added for your information.