Well first off, 2GB to 4GB of RAM is not really going to help anything, and unless you have XP/Vista 64-bit it is useless.
Second, Vista? Good lord man, but it's do-able, may want to ask someone for info on any useless programs that can go. Also, it is best to install the game in something besides C:Program files or so I have heard.
That Video card "Intel Graphics . . . 3100" is an on-board video (unless Intel started making add-in GPUs). On-board is normally not good for gaming, and AH is no exception.
So, I would suggest trying to minimize things running in Vista, and upgrade the Video card (may require a PSU upgrade), however I know someone else will know more, so they may help more.