yes - just one shootthrough umbrella box and yn flash. very simple setup.
^^^
What this guy says...
Although it's always best to get it 'right' in camera first, and then take it to photoshop.
With regards to adamau5's portrait, very little needs doing imo considering the mood of the shot, except maybe the colour looks like it's got a yellow colour cast slightly (maybe it's my monitor), and maybe a little work could be done on the lashes.
I hardly do this to any of my photos I have photoshop cs3 but only use it to make things brighter or make things sharper etc. I am currently a student so should i use this to get lightroom on a student fee?