Adding USB 3 drivers to W7 repair disk  

How can I add the usb3 drivers to a Windows 7 repair disk?
I have
Windows 7 install.ISO
& Repair disk.ISO
& external USB hard drive containing a System Image (backup was done using USB 3 drive)
& Intel USB3 driver.exe
& PowerISO utiity program

Initially my question is
when booting with Repair Disk
if I want to use a USB3 drive to read my System Image
I am asked for a Driver Disk
What is expected in the driver disk?
The USB driver download as an .exe
which I have unzipped
What do I copy onto (e.g) a Driver DVD
so that it will be acceptable to the Load Driver request

Then I will move on to ask if there is a method of "adding" the USB3 drivers
to the W7 Repair Disk
NB I have PowerISO which includes a DISM option (whatever that is)

I can get by using my PCs USB2 drives
but the USB3 drives will presumably perform much faster

There are several Youtube vids but while appreciating the effort
I find them unclear
A written procedure would be better

Isn't there an Intel USB 3.0 utility if I'm not mistaken? It's been a long time since I last installed 7 to a computer with only USB 3.0 ports, so my memory is fazy.

Thanks very much - mission accomplished
I have LAPTOP & DESKTOP both with W7Pro/64
& different USB3 drivers
Looking through my archives, I see I bought MagicISO, then WinISO
& now I have bought a license for PowerISO which I think is good value considering its several goodies
I originally generated 1 disk for each PC but then reconsidered & redid, adding both sets of USB3 drivers
I now have a Repair disc that works on both machines
(I didn't know what DISM was until I looked it up)

SIW2 is is possible to do this for an x64 image on x86 W7? Just curious.