If your looking to save, instead of that 4770 get a Xeon E3-1230V3 http://www.newegg.com/Product/Product.aspx?Item=N82E16819116906 .
The only disadvantage is no integrated graphics.
You could copy the disc with magiciso on another pc and then put the iso on a flashdrive, use magicdisk, and mount the iso and install it that way.
Btw halo 2 for vista, the gwls is shutdown.