1. Download Flash Player 10.1 RC 4:
wget http://download.macromedia.com/pub/labs/flashplayer10/flashplayer10_1_rc4_linux_050510.tar.gz
tar -xvf flashplayer10_1_rc4_linux_050510.tar.gz
Or manually download it from HERE.
2. Install Flash Player RC in Linux
I already wrote how to install it (copy/paste commands), HERE so continue from there (no point in writing the same thing again).
Thanks to Paulo!