Get Data off non formatted disk

[Sintoras]

Ok, following problem:
My computers mobo broke irrepairably and had to be replaced. For some reason they tech guys told me they'd add on another harddrive along with my existing two to install windows on these.
Alright, so now I have installed windows on that drive but when I want to access my two old drives which for all I knew had a perfectly fine set of windows vista on them, it says the harddrives aren't formatted and I should format them. I do not under any circumstances want to lose my data though.
How can I access these drives without formatting them? I can't see why they aren't formatted correctly now if they were before.

Thanks

 

[Ensabahnur]

Do the other hard drives (the old ones) show up in the BIOS?

 

[Tru_Power22]

Try using a program like recuva.

http://www.piriform.com/recuva