Created Custom Models (markdown)

Custom-Models.md

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+## What are Stable Diffusion models?
+Stable Diffusion UI uses so called models to create the images. The models get trained using many images and image descriptions. During the installation,
+a default model gets downloaded, the sd-v1-4 model. Other models exist. Some of them use sd-v1-4 as their base and were then trained on additional images, while other models were trained from scratch.
+
+Depending on the images used during the training, the models generate a different look and understand different prompts.
+
+## Installing a model
+If you've downloaded a model, you can make it available to Stable Diffusion UI:
+- Copy the model file to `C:\stable-diffusion-ui\models\stable-diffusion`. The file should have the suffix `.ckpt`.
+- Reload your browser page. The model should be listed in the "Models" section in the image settings:
+
+    ![image](https://user-images.githubusercontent.com/5852422/197419759-45cba5a7-58ef-4fff-a6b2-80536d7f609e.png)