The great meltdown of 2011

I haven't been on to do ANYTHING on LJ for the last few days as my laptop crashed.  :-(  I managed to get a new hard drive in it and recover most of my files from my back up external and Carbonite, but I appear to have lost all my video files.  So, I'll have to start dl'ing them all again soon.  :-(  That's season 4 and 5 of Primeval, season 4 of Torchwood, and some random Dr. Who eps that I had.  

Also, if anyone knows how to get a .rar file on a mac to open, I'd appreciate the info.  Thanks.