Include ConfigMgr Client Cumulative Update during OSD

During deployment in ConfigMgr, you can install the ConfigMgr Client Cumulative Update immediately. There are multiple posts found where the PATCH= parameter is used. The Cumulative Update needs to be in a package or reference image (included for installation) for this. I see lots of times the PATCH= parameter is skipped, for different reasons. Let's have a look at another way to install the Cumulative Update. This one is not hard at all. It just works :-)

Just create ClientPatch folders in both ConfigMgr Client locations:
-Program Files\Microsoft Configuration Manager\Client\x64
-Program Files\Microsoft Configuration Manager\Client\i386
and copy the appropriate architecture (x64 and/or i386) from your hotfix to one of this folders. Do not forget to update your ConfigMgr Client Package to be sure using the Files with the Hotfixes.

That's it! No PATCH= parameter needed at all. It did work on my first try (CU4), so very easy to use if you ask me :-)

When using Client Push Installation it will be helpfull either. No need to apply the CU client update afterwards. It will be detected automatically:
-Detected 1 client patch files. Will apply them after client installation.
-Adding file 'configmgr2012ac-r2-kb3026739-x64.msp' to BITS job, saving as 'C:\Windows\ccmsetup\configmgr2012ac-r2-kb3026739-x64.msp'.
-C:\Windows\ccmsetup\configmgr2012ac-r2-kb3026739-x64.msp is Microsoft trusted.
-File C:\Windows\ccmsetup\configmgr2012ac-r2-kb3026739-x64.msp installation succeeded.
-Params to send FSP message '5.0.7958.1501 Deployment [DP]

Why this is a hidden/undocumented feature suprised me.
Can't be easier if you ask me :-)

Source: SCCMfaq.ch
Source: Systems Management and Automation

Update 6-7:
@jarwidmark - That method works for some, breaks for some, but either way, it is totally unsupported by Microsoft.
@rsjulsen - This method has totally worked for me :) But ofc.. Totally unsupported.. and totally, totally awsome :)

Update 24-8:
With Cumulative Update 1 for ConfigMgr 2012 R2 SP1 and 2012 SP2 this isn't needed anymore. Source: Automatically updating the Configuration Manager client