I've found this CABs:

-from Windows Embedded, which can be integrated in Windows ThinPc

winemb-mediacenter
winemb-mediaplayer
winemb-media-support
winemb-mobilepc
winemb-natural-language
winemb-netfx20
winemb-netfx20client
winemb-netfx30
winemb-netfx30client
winemb-netfx35
winemb-netfx35client
winemb-search
winemb-tablet

and NetFx4.cab which can be integrated in WinPE 4 (build 8250).
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Now I'm asking:
Is there any way to force DISM to add package in any image i.e. install.wim / Windows SKU of course on build 6.1 and above (not for vista).

If we find a way to bypass this, then we can integrate great packages in our systems like premium codecs, mediacenter, netframeworks, tablet support and etc...

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Till now,
I tried to modify some files in the extracted package, where build number is mentioned but doesn't work
I also tried to use /ignorecheck switch but without any success

Any other suggestion?

I was succesful getting the NetFx4 applied to WInPE4 but to be honest later on I had errors too.
What I didnt know was that you cannot put any 3rd party files into .wim file, it will check it.

The log file could be useful also, I think it was in \Windows\Logs\DISM\dism.log ?

EDIT: I was unable to fix my error it was something like "DIsm is corrupted" or something, not sure.

I have been looking for this too but couldn't find it out.
But the ignorecheck switch has something do do with corrupted packages I think, not for checking compatibility stuff.