thank you much and yes it would look funny but depending on your case they make bays that adapt from a 2.5 up to a 3.5 or even a hotswapable bay where you can use this like a flash drive plug it in put what you need on it and remove it
yup you would have to get a universial but here is one link i didnt spend a lot of time looking either so if you did mabie you could find one that looked better
Serial ATA is the way that it connects to the motherboard according to the specs for that machine it does infact take a serial ATA hard drive and in short Serial ATA is SATA drive hope this helps