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SCCM 2007 w/ MDT and PXE boot

I have SCCM 2007 with MDT integrated and I am able to push images via PXE boot but it takes forever just to load the boot image. The two default boot images in SCCM are showing up at ~750MB in  Config Manager. I made a new one using MDT but it's showing up at ~850MB where the .wim itself is only showing to be about 150mb on the HDD.

Am I missing something? The only thing I added was a few NIC drivers...
2 Solutions
David Johnson, CD, MVPOwnerCommented:
none of mine are that large
LiteTouch Wim/iso
Mike TLeading EngineerCommented:

That is definitely too big. Boot (PE) images are by default around 300-400MB.
Did you add any extra packages like HTA support?
You only need two for SCCM:

    WinPE-Scripting : for processing deployment scripts.
    WinPE-WMI : for task sequence support.

I was looking for a screenshot but found this instead:http://technet.microsoft.com/en-us/library/hh824926.aspx

the only other question is the drivers:
a) what files did you add for each driver?
b) just how many were "a few"

You normally only need to add 3 files per NIC - something like:

WinPE 3 and above normally has all the common network drivers already.

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