There is another easier way. By cloning Windows 7 to NVMe SSD.
The main process:
1. Install Windows 7 on a regular drive.
2. Then connect the NVME SSD as a secondary drive to your computer.
3. Install the proper driver for the NVMe SSD.
4. Clone Windows 7 with NVMe driver to NVMe SSD using SSD cloning software.
After the clone, you can set Windows 7 NVMe SSD as the boot device and boot your computer from the cloned drive because the needed driver is also cloned over.