thanks everyone, FINALLY got it to work, what i did was used kill disk for both my hard drives.
Then i installed xp on the new hard drive i installed. Then i installed vista on the defalt hard drive that came with the computer.
Here the thing though i installed the new drive into the ide port of my mother board.
So after that i was able to set bios to ahci and not ide. Don't know how this actually worked but it set
that drive to primary.
I still don't have the choice for which operating system to use. But i start my computer and hit the F8 key to go to boot menu
Here is were my drives come up. Then i select the xp drive. If i just hit power on button and not F8 key it boots into vista.
I did however had to install my audio card drivers which is what i found was the entire problem, go figure.
After that the two drives come up as drive c: under what ever system i booted to.
So if im using the xp drive the letter for that is c and vista is g
If im in vista the system drive is c and xp is I .
Not sure how all this managed to work , because i spent 10 hours to get it to work and installed operating system like over and over.
If anyone else has this problem post here and ill try and help.
My computer is a medion triple core from aldi's grocery store.
It did come with drivers for xp even thought it was installed with vista.
Hope this helps.
thanks again to all.