What OS is on the new PC???
If it is a Windows OS then you could just copy it over (hard drive to hard drive).
You could take the hard drive out of your old PC and set it up in your new PC as a slave. To do this you will need to set the jumpers on the back of the hard drive. Set the hard drive in your new PC as master and the hard drive in your old pc as slave (default should be cable select). Connect the IDE cable and power cable and away you go.
You should be able to see both drives (should be c: and d
. Go to the files you want and copy them over to your new hard drive.
Hope this helps.
If it is a Windows OS then you could just copy it over (hard drive to hard drive).
You could take the hard drive out of your old PC and set it up in your new PC as a slave. To do this you will need to set the jumpers on the back of the hard drive. Set the hard drive in your new PC as master and the hard drive in your old pc as slave (default should be cable select). Connect the IDE cable and power cable and away you go.
You should be able to see both drives (should be c: and d
Hope this helps.