Update how_to_use_nnunet.md

Add how to deploy and run your pretrained model for inference on new images.

documentation/how_to_use_nnunet.md

@@ -290,6 +290,13 @@ from the respective training). You can pick these files from any of the ensemble
 ## How to run inference with pretrained models
 See [here](run_inference_with_pretrained_models.md)
 
+## How to Deploy and Run Inference with YOUR Pretrained Models
+To facilitate the use of pretrained models on a different computer for inference purposes, follow these streamlined steps:
+1. Exporting the Model: Utilize the `nnUNetv2_export_model_to_zip` function to package your trained model into a .zip file. This file will contain all necessary model files.
+2. Transferring the Model: Transfer the .zip file to the target computer where inference will be performed.
+3. Importing the Model: On the new PC, use the `nnUNetv2_install_pretrained_model_from_zip` to load the pretrained model from the .zip file.
+Please note that both computers must have nnU-Net installed along with all its dependencies to ensure compatibility and functionality of the model.
+
 [//]: # (## Examples)
 
 [//]: # ()