diff --git a/Containerfile b/Containerfile
index caa8a00..6e4bc6e 100644
--- a/Containerfile
+++ b/Containerfile
@@ -2,16 +2,21 @@
 ## These enable the produced image to be different by passing different build args.
 ## They are provided on the commandline when building in a terminal, but the github
 ## workflow provides them when building in Github Actions. Changes to the workflow
-## build.xml will override changes here.
+## build.yml will override changes here.
 
-## SOURCE_IMAGE arg can be anything from ublue upstream: silverblue, kinoite, sericea, vauxite, mate, lxqt, base
+## SOURCE_IMAGE arg can be anything from ublue upstream: silverblue, kinoite, sericea, base
+## See list here: https://github.com/orgs/ublue-os/packages?repo_name=main
 ARG SOURCE_IMAGE="silverblue"
+
 ## SOURCE_SUFFIX arg should be "main", nvidia users should use "nvidia"
 ARG SOURCE_SUFFIX="main"
+
 ## FEDORA_VERSION arg must be a version built by ublue: 37 or 38 as of today
-ARG FEDORA_VERSION="38"
+ARG FEDORA_VERSION="39"
+
 ## NVIDIA_VERSION should only be changed if the user needs a specific nvidia driver version
-##   if needing driver 535, this should be set to "-535". It is important to include the hyphen
+## This will depend on your hardware and the version of the driver that supports it.
+## if needing driver 470, this should be set to "-470". It is important to include the hyphen
 ARG NVIDIA_VERSION=""
 
 
@@ -21,6 +26,8 @@ FROM ghcr.io/ublue-os/${SOURCE_IMAGE}-${SOURCE_SUFFIX}:${FEDORA_VERSION}${NVIDIA
 
 
 ### 3. PRE-MODIFICATIONS
+## This section is meant for any modifications to the image before the main modifications are made.
+
 ## this directory is needed to prevent failure with some RPM installs
 RUN mkdir -p /var/lib/alternatives
 
@@ -28,24 +35,32 @@ RUN mkdir -p /var/lib/alternatives
 ### 4. MODIFICATIONS
 ## make modifications desired in your image and install packages here, a few examples follow
 
-# install a package from standard fedora repo
-RUN rpm-ostree install screen
+#### Install packages
 
-# install a package from rpmfusion repo
+# install a package from standard fedora repo or rpmfusion repo
+# RPMfusion packages are available by default in ublue main images
+# List of rpmfusion packages can be found here:
+# https://mirrors.rpmfusion.org/mirrorlist?path=free/fedora/updates/39/x86_64/repoview/index.html&protocol=https&redirect=1
+RUN rpm-ostree install screen
+# exmaple package from rpmfusion
 RUN rpm-ostree install vlc
 
+#### Installation of static binaries
+
 # static binaries can sometimes by added using a COPY directive like these below. 
 COPY --from=cgr.dev/chainguard/kubectl:latest /usr/bin/kubectl /usr/bin/kubectl
-#COPY --from=docker.io/docker/compose-bin:latest /docker-compose /usr/bin/docker-compose
+# COPY --from=docker.io/docker/compose-bin:latest /docker-compose /usr/bin/docker-compose
+
+#### Change to System Configuration Files
 
 # modify default timeouts on system to prevent slow reboots from services that won't stop
 RUN sed -i 's/#DefaultTimeoutStopSec.*/DefaultTimeoutStopSec=15s/' /etc/systemd/user.conf && \
-    sed -i 's/#DefaultTimeoutStopSec.*/DefaultTimeoutStopSec=15s/' /etc/systemd/system.conf
+  sed -i 's/#DefaultTimeoutStopSec.*/DefaultTimeoutStopSec=15s/' /etc/systemd/system.conf
 
 
 ### 5. POST-MODIFICATIONS
 ## these commands leave the image in a clean state after local modifications
 RUN rm -rf /tmp/* /var/* && \
-    ostree container commit && \
-    mkdir -p /tmp /var/tmp && \
-    chmod 1777 /tmp /var/tmp
+  ostree container commit && \
+  mkdir -p /tmp /var/tmp && \
+  chmod 1777 /tmp /var/tmp