SPX Board Amends Compensation Programs  CHICAGO (Reuters) - SPX Corp.'s &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=SPW.N target=/stocks/quickinfo/fullquote"&gt;SPW.N&lt;/A&gt; board amended its  management restricted stock and director compensation programs  the day after its chairman and chief executive resigned, the  company said on Friday.