You don't neccesarely need to enter the BIOS. I would just hook it up to one of your IDE cables and make sure one of the devices on that cable is set to master, and one of them is a slave (or set both to cable-select) using the little jumpers on the back of your drive. It should give instructions on the disk label on how to set the jumpers. Boot your computer and see if it showing in "My Computer".
If not, go to start>run and type "diskmgmt.msc" and post a screenshot.
There's only 1 thing you might have to do in your BIOS, the used IDE channel should be enabled.
TheMajorMMX - Intel P200 MMX @ 225Mhz - V-Tech (PcPartner) Baby-AT mb w/ Intel Triton TX chipset - Nvidia Riva TNT2 M64 w/ 16MB - 256MB M-Tec SDRAM - Still running.....