Unexpectedly, Blizzard released Starcraft Patch 1.15.2 …. which allows players to play Starcraft and Brood War expansion without a CD loaded on their CD-ROM Drive.

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– patch 1.15.2
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Feature Changes

StarCraft and StarCraft: BroodWar no longer require the CD while playing the
  game.  To play without the CD, please follow the following instructions:

Windows Users

  • Make sure you have “Hide extensions for known types” unchecked under Explorer Folder Options.
  • If you own only StarCraft, copy “INSTALL.EXE” from the StarCraft CD to your StarCraft folder and rename it to “StarCraft.mpq”.
  • If you own StarCraft: Brood War, copy “INSTALL.EXE” from the StarCraft: Brood War CD to your StarCraft folder and rename it to “BroodWar.mpq”.

Mac users

  • If you own only StarCraft, copy “StarCraft Archive” from the StarCraft CD to your StarCraft folder.
  • If you own StarCraft: Brood War, copy “Brood War Archive” from the StarCraft: Brood War CD to your StarCraft folder.

INSTALLATION GUIDE