How to add new color space to Camera Raw

[texshooter555]

How do I add a new color space (eg, Beta RGB) to the workflow options inside Adobe Camera Raw? I was able to do it inside Photsohop, but not ACR. Is there a special folder inside Windows 10 where I must copy the .icm file into.  I already saved a copy of the .icm file inside the C:\Windows\System32\Spool\Drivers\Color folder. But no luck. Does ACR only allow sRGB, aRGB, ProPhoto RGB, and Colormatch RGB?

[TheDigitalDog]

You see the added ICC profile in Photoshop but NOT ACR? Because that shouldn't be the case nor any different; I see all installed ICC profiles in ACR accessible. No, ACR doesn't only allow those few color spaces you mention. 

[texshooter555]

Pretty much. They're on the PS dropdown list but not there on the ACR list.  I'm still using CS4 and ACR 5.7.  Maybe that's why.

ACR snapshot:

Photoshop snapshot:

[TheDigitalDog]

Yes, DO update your copy of ACR!