Do you typically extract exe files? lol.
IIRC you place it in:
for 32bit: C:\Program Files\StarCraft II Beta
for 64bit: C:\Program Files (x86)\StarCraft II Beta
IIRC you place it in:
for 32bit: C:\Program Files\StarCraft II Beta
for 64bit: C:\Program Files (x86)\StarCraft II Beta