Windows Update Patches from Wyse quest

I have a collection of c90lew thin clients and need to apply windows updates. I have successfully used WDM to do a test patch to a test client.

My question is this. They seem to have a few different versions of patches. They will be named something like:

MS11-011_WESWFR1WFR2

Obviously the first part is the windows update.
Second part though is a bit cryptic. WES stands for Windows embedded System, but what does WFR1WFR2 mean? Some of the patches seem to only be for one or the other or both, but I have no idea what it is referring to.

Second part of the question..

Is there a way to use WDM to deploy patches, but not do them one at a time. Doing each one separately is very time consuming and seemingly inefficient.

Thanks in advance,

Geoff