ughhh cant get my pcsx to run

I recently downloaded a .rar package of final fantasy tactics and it came out as a .bin.ecm and a .cue file, which is normal i assume. I try to open up the .bin file directly with pcsx using the moopy plugin or whatever and it says "The document “Final Fantasy Tactics [NTSC-U] [SCUS-94221].bin.ecm” could not be opened. PCSX cannot open files in the “PCSX Document” format." What can i do to fix this? i tried mounting things with toast but nothing helps...by the way im on a macbook pro 4gb ram 250hd.