When you connect the SATA drive via the IDE-SATA adapter you won't have to use an IDE data cable.
This is because the adapter plugs into the motherboard's IDE header (see pic 4 at click here) & connects to the SATA drive via a SATA cable only.
So if you don't have them, you'll also need to buy a SATA data cable & SATA power cable - latter only if the PSU you're using doesn't have a SATA power connector.
Also note that to power the IDE-SATA adapter, your PSU needs a single floppy-drive type connector. Do you have one of these connectors free? There's a way around this if you don't. G