diff --git a/README.md b/README.md
index 95541d6..93c06a7 100644
--- a/README.md
+++ b/README.md
@@ -44,4 +44,4 @@ Host and Guest images are constructed in GitHub Workflows via [`mkosi`](https://
[hardware-tables]: ./docs/certifications.md#certification-levels-by-hardware
[cert-definitions]: ./docs/certifications.md#certification-level-definitions
-
+Users who are new to create new host and guest images with mkosi tool to add new OS support can follow our guide [here](./docs/how-to-add-mkosi-images.md).
diff --git a/docs/how-to-add-mkosi-images.md b/docs/how-to-add-mkosi-images.md
new file mode 100644
index 0000000..687c20b
--- /dev/null
+++ b/docs/how-to-add-mkosi-images.md
@@ -0,0 +1,128 @@
+# Create, test and publish new guest/host images
+
+Users can create and publish new host or guest images in sev-certify with mkosi tool in the following steps:
+
+- [**System Set Up:**](#system-set-up) Install mkosi on your system.
+- [**Build mkosi image:**](#how-to-build-hostguest-mkosi-images) Configure mkosi config and make host/guest images in sev-certify using mksoi tool.
+- [**Test Images:**](#how-to-test-hostguest-images) Launch the built host/guest images using a QEMU tool.
+- [**Publish new guest/host images:**](#add-new-hostguest-mkosi-images-as-gh-artifacts) Add a new OS image in the sev-certify workflow to create GH artifacts for host/guest image
+
+## System Set Up
+Install mkosi-v25.3 on the system to match mkosi version present in sev-certify GH project:
+
+- **Option 1:** Install mkosi version 25.3 directly on the supported operating systems using package manager
+List of supported operating systems for mkosi version 25.3 can be tracked in the mkosi landing page [here](https://github.com/systemd/mkosi/tree/v25.3), or follow the instructions given in Option 2.
+- **Option 2:** Build and install mkosi-v25.3 from the source mkosi GH repository
+ ```
+ cd /tmp
+ git clone https://github.com/systemd/mkosi.git
+ cd mkosi
+ git checkout v25.3
+ ```
+ Install it manually since mkosi might not be in all package managers by default.
+ Inside the /tmp/mkosi directory, run the following:
+ ```
+ sudo make install
+ ```
+ Alternatively, move the mkosi script to your local bin directory:
+ ```
+ sudo cp mkosi /usr/local/bin/
+ ```
+ Check if mkosi version 25.3 is installed correctly:
+ ```
+ mkosi --version
+ ```
+ Ensure QEMU and OVMF guest firmwares are installed to test the launch of built mkosi images on the system.
+
+## How to build host/guest mkosi images
+
+### Configure and Build new Host Image
+ The new host image for the sev-certify can be built using the following steps:
+
+1. **Create a mkosi config for the new host image:** New mkosi configuration to make new host image should be created under `sev-certify/images/host--` folder:
+ ```
+ [Include]
+ # Include required modules in the host image
+ Include=../../modules/host
+
+ [Distribution]
+ Distribution=
+ Release=
+
+ [Content]
+ # Add required host os packages
+ Packages=
+ ```
+ 2. **Build new host image using mkosi:** New guest image can be built in the system from sev-certify root directory using mkosi tool as follows:
+ ```
+ mkosi --image-id=host-- \
+ -C images/host-- build
+ ```
+
+### Configure and Build a new Guest Image
+ The new guest images for the sev-certify can be built using the following steps:
+
+1. **Create a mkosi config for the new guest image:** New mkosi configuration for the new guest image should be created under `sev-certify/images/guest--` folder using the similar guest mkosi template:
+
+ ```
+ [Include]
+ # Include required modules in the guest image
+ Include=../../modules/guest
+
+ [Distribution]
+ Distribution=
+ Release=
+
+ [Content]
+ # Add required guest os packages
+ Packages=
+ ```
+
+2. **Build new host image using mkosi:** New guest image can be built from sev-certify root directory in the system using mkosi tool as follows:
+ ```
+ mkosi --image-id=guest-- \
+ -C images/host-- build
+ ```
+
+## How to test host/guest images
+
+Create launch-mkosi-image script to launch the built mkosi image using QEMU:
+ ```
+ cat <<'EOF' > launch-mkosi-image.sh
+ #!/bin/bash
+
+ # Check if a guest image is provided
+ if [ -z "$1" ]; then
+ echo "Usage: $0 [ovmf_path]"
+ exit 1
+ fi
+
+ guest_image="$1"
+
+ ovmf_path="${2:-/usr/share/edk2/ovmf/OVMF_CODE.fd}"
+
+ sudo qemu-system-x86_64 \
+ -cpu EPYC-v4 \
+ -nographic \
+ -m 2G \
+ -bios "${ovmf_path}" \
+ -kernel "${guest_image}"
+
+EOF
+```
+
+Launch the built host/guest image using QEMU on the QEMU enabled KVM hypervisor host:
+ ```
+ bash launch-mkosi-image.sh
+ ```
+
+## Add new host/guest mkosi images as GH Artifacts
+ Once the launch of host/guest images works, users can release these new images to the GH artifacts by adding the new OS release support to the distro matrix in the build-and-release.yml workflow under the sev-certify/.github/workflows:
+ ```
+ - distro:
+ release:
+ ```
+
+## References
+- PR to add Ubuntu 25.04 Support into the sev-certify project is present in this [link](https://github.com/AMDEPYC/sev-certify/pull/222)
+