Solid State Drive

Hi guys.I have three hard drives on my computer at the moment,but I would like to try a SSD. The three drives run XP 32 ..Vista 64....and Win 7 64. My first question is...can the new SSD drive also run Win 7? When I start my computer at the moment I get a choice of which drive (OS) to boot up,but if I put Win 7 on the new drive what will happen?My second question is do I need to install any OS at all on this drive,and just use it for FSX and add ons? If that's a silly question please forgive me,but I am not too clear on this.Thank you for any help or advice you can give me.All the best.Dennis