well heres the requirements
Minimum: 1.2 GHz Processor, 256MB RAM, DirectX 7 level graphics card, Windows 2000/XP/ME/98, Mouse, Keyboard, Internet Connection
Recommended: 2.4 GHz Processor, 512MB RAM, DirectX 9 level graphics card, Windows 2000/XP, Mouse, Keyboard, Internet Connection
And your machine meets them so prolly will be able to play it i havent played it so i dunno if it realy will
Although it will play that ,thats isnt the greatest machine for gaming but if thats all you wanna play then no need to upgrade at all .
About the HD it aint the best but it is prolly a lot better than others .