This might be a way to do it, but it requires having the updates already
That is not how I did it, but it looks like it might be a better bet than trying to get wsusoffline to install them.
Another way:
Integrate 151 updates into the install.wim image.
Install to a spare partition
Press ctrl+alt+F3 at the first oobe screen to reboot into audit mode.
Run the 4 "speedups" - those can't be successfuly integrated.
Reboot.
Install the rest of the updates, and any drivers , rebooting where necessary ( still in audit mode)
When done, tick the generalise box and select reboot to oobe.
Don't reboot back into that vista partition - instead boot into another os.
Capture the updated vista partition into an install.wim file using any number of tools. I prefer to use wimlib.