In order to use it (the way person who wrote that article says), you have to unzip it. The same Instant Client ZIP file occupies 463.956 KB on disk. 'Waste hundreds of megs'? No kidding! Instant Client (10.2.0.1.0) needs 498 MB. 'Install everything'? Oracle Universal Installer suggests several options, such as Instant Client, Runtime, and - oh, guess what? - Custom installation which enables you to choose individual components to install.
Quote: Did you ever get frustrated when you want to connect with your oracle database, but you have to install everything from oracle client software cd and waste for hundreds megs only to get connect with your database? No major objections, but one: the first sentence: I read contents of the page you suggested. 'Run From Server'='res:US,prodmsg:US,script:US,dll:US' 'ORACLE_GROUP_NAME'='Oracle - DEFAULT_HOME1' 'inst_loc'='C:\\Program Files\\Oracle\\Inventory'