So question is in title of topic. Windows 7 can’t install MTP driver for tegra devkits.
If you installed Tegra Android Development Pack, driver for tegra kits is located in \android-sdk-windows\extras\google\usb_driver.
If you have a unmodified usb driver downloaded from Google, just add those line in the inf file (into Google.NTx86 and Goolge.NTamd64 sections):
%SingleAdbInterface% = USB_Install, USB\VID_0955&PID_7000
%CompositeAdbInterface% = USB_Install, USB\VID_0955&PID_7100&MI_01