xflatlinex

Does anyone know how I can specify that I want it to install automatically to my C Partition. I have 3 partitions, my File Server Partition (D:) and Linux partition, and I just want it to automatically install to C: without erasing the other partitions. What do I need to set up in my winnt.sif file for this to occur. Thank you very much for any responses, and by the way I am using XP Pro.