When you install the drive, you will need to set a jumper on the back of the drive. If you are replacing the current LG drive, look and see if the LG is connected to the middle of the IDE cable, or the very end connector.
If it is the middle, you will need to set the jumper to the slave setting on the back of the new drive; if it is on the very end, you need to set it to the master setting.
Not hard to do, but it is a necessary step. Good luck.