If you have not caught wind of this yet, you can download and install the “Windows Management Framework 3.0” on your boxes that are not Server 2012 or Windows 8.
As in the past this is more than just PowerShell, it includes WMI and WinRM compatibility updates. (just not a big BITS update like v2 did).
You can find it here: http://www.microsoft.com/en-us/download/details.aspx?id=34595
This is for Windows 7 SP1 and Server 2008 SP2 or Server 2008 R2 SP1.
And, don’t forget Update-Help after you install it.
But you might as well be on your way to managing your Server 2012 / Windows 8 infrastructure the PowerShell way.
If you need .Net 4 you can find that for Server over here: http://www.microsoft.com/en-us/download/details.aspx?id=17718
And for Server Core here: http://www.microsoft.com/en-us/download/details.aspx?id=22833
If you run an OS that is older. I am sorry, MSFT does not look back. You can be one version old, but XP / 2003 is way out.