PCSX-Reloaded is a forked version of the dead PCSX emulator, with a nicer interface and several improvements to stability and functionality.
PCSX-Reloaded uses the PSEMU plugin interface to provide most functionality; without them, you will not be able to use it to play games. PCSX-Reloaded provides a number of plugins to provide basic functionality out of the box.
PCSX-Reloaded has a very capable Internal HLE BIOS that can run many games without problems. It is recommended that you use it. However, if you own a real PlayStation, you may be able to use your own BIOS image. PCSX-Reloaded will find it in ~/.pcsx/bios/ or /usr/share/psemu/bios/ if you place it there. This can improve compatibility, especially with certain games and with the use of memory cards.
See the doc/ folder in the source, or /usr/share/doc/pcsx/ on Debian systems, for more detailed information on PCSX-Reloaded. A UNIX manpage is also available.