The style ejs-article.sty may be used with latex209 and latex2e. It is compatible with almost any macros or commands defined by the authors. The only changes you have to introduce regard the initial part of the documents.

The file ejs-article.doc contains an explanation of the use of our macros. You can also see the files sample-latex2e.tex or sample-latex209.tex for examples of the use of this style.

Besides, you should revise your document to check whether there are new overfulls due to the rather wide margins of the style. If that is the case, you should change your document so as to elliminate the overfulls.