reinstallation dvd hangs on starting windows screen

just ordered a new hd from amazon, it was 25 bucs......320Gb is PLENTY of room for sisters use, and if she sells it, its still a decent size for everyday use...............I just have to get my brain thinking again as to what this new HDD should have done to it, if anything, before i put the dvd in to install win 7

Western Digital Caviar Blue 320 GB Bulk/OEM Hard Drive 3.5 Inch, 8 MB Cache, 7200 RPM SATA II WD3200AAJS

let the OS do the work then, make partitions etc, so boot from dvd and thats it then and let the dvd do its install........i do know once its done i need to ck device manager to see all whats needed, driver wise, then install them

just letting you know..........i got the new HDD put it in then i set the dell to boot from win 7 reinstall dvd.....windows loading files screen, then starting windows screen and FROZE yet again.......

i decided to see if the dvd was good or not and put it in an old laptop...the reinstall dvd went thru...windows loading files, then starting windows, then continued thru the rest of install til i stopped it........So i know it works..........next thing i did was take out the optical drive and got a new one, thought maybe its the dvd/cd drive not working right.........well got it to boot from dvd again and windows loading files screen, then starting windows screen...then FROZE yet again...........

so a new HDD, and NEW optical dvd drive, a win 7 reinstall dvd that worked on a laptop..............

so why in hell wont it go past starting windows???? dell knows the model of the desktop pc and sent me the right dvd......why would the dvd load and install on an old laptop, but not on the desktop with new hardware????? supposedly 64 bit system cause the memory modules can expand to 8 or so GB of ram......the goofy laptop was an old emachine and it had vista on it.............anyone have any ideas