I copy .tex file from MikTeX to Scientific Word; in MikTeX, everything is fine; but in SW, I got etex.sty not found. error.

I copy the file stex.sty from MikTeX to SW; then I go the following error message.

! Package etex Error: This package may only be run using an
(etex) etex in extended mode.

I checked my MikTex and find the etex file:

C:\Program Files\MiKTeX 2.9\tex\latex\misc

But it does not say which package the file is in? You know that means I do not know which package I need to add to SW.

Could someone help me with that?

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Welcome to TeX.SX –  Adam Liter Jul 13 '13 at 18:38