Please be more clear. Are you trying to:
1. Physically move a hard drive from one laptop into another laptop, but one is IDE and the other SATA? Sorry, can't be done. You could get an external USB enclosure that matches the drive interface.
2. Access the files on one laptop while using another laptop? If so, network them. You'll need a router and possibly cables (unless both laptops have wireless networking; they may be able to network without a router).
3. Something else? You'll need to give a lot more information.