1. Adobe Flash Player 11.2 on Fedora 18/17

1). Install Adobe YUM Repository RPM package
rpm -ivh http://linuxdownload.adobe.com/adobe-release/adobe-release-x86_64-1.0-1.noarch.rpm
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux

2). Update Repositories
yum check-update

3). Install
yum install flash-plugin nspluginwrapper alsa-plugins-pulseaudio libcurl

Reference:

• Install flash on fedora

2. Play music and movies

1). add yum repository
su -c 'yum localinstall --nogpgcheck http://mirrors.163.com/rpmfusion/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://mirrors.163.com/rpmfusion/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm'

2). install mp3 and other audio support
su -c 'yum install gstreamer-plugins-good gstreamer-plugins-bad gstreamer-plugins-ugly libtunepimp-extras-freeworld xine-lib-extras-freeworld'

3). install video support
su -c 'yum install ffmpeg ffmpeg-libs gstreamer-ffmpeg libmatroska xvidcore'

question:
Appear erro message as below when install:
GPG key retrieval failed: [Errno 14] Could not open/read file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rpmfusion-free-fedora-18-x86_64
Check file
ls /etc/pki/rpm-gpg/RPM-GPG-KEY-*
Can not found /etc/pki/rpm-gpg/RPM-GPG-KEY-rpmfusion-free-fedora-18-x86_64

Solution:
su -c 'yum localinstall --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-18.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-18.noarch.rpm'

Reference:

• Fedora 17 无法播放mp3 rmvb
• GPG key retrieval failed

Update:
Install gnome-mplayer-common rpm

3. How to create and use Live USB

Reference link: http://fedoraproject.org/wiki/How_to_create_and_use_Live_USB