So last night I managed to add the extra 4GIGs RAM, added the graphics card (was intending to add the ASUS GT520 as it is also a low profile but the heatsink/cooler built on it was too big

so I had to install the GT210, will maybe later on upgrade it as the GT210 only has 512MB). I then installed Windows 7 Ultimate 64bit and a few other programmes (antivirus, VLC, iTunes ect) and of course Plex Media Server and Media Centre.
I couldn't add my additional HDD's because I didn't have the screws to tighten them to the caddy's but will be getting some today and then proceed to install them.
I just have a few question regarding Plex server and media centre. Once I install the 2x 2TB's HDD's, do I go into the media server setting to add them to my libraries or do I add them somewhere else (so I can see them in the Plex Media Player - hope that makes sense?)?
And secondly, does it automatically start scraping the media or do I have to start it? If I have to, where do I do this? On my one drive where most of my content is, I already have all the art work, movie/episode write ups ect as I use to use a WD TV Live Media Player which would download all this info for each movie/series - should I delete these files or will they work still with Plex? I don't want to have duplicates or the wrong info so if I need to delete all the files and start over, I'd rather do that to save myself hassle down the line.
Once everything is added and scraped, will I then just need to set Plex to start automatically on boot and then be able to browse and play my media as I would with any other media player or is there something else I need to do?
Sorry for all the questions, just really excited to get this up and running finally.