Running Two Drives

Currently, I now have a C: and a D: with the C: being my solid state drive and the D: being my standard hd. However, within windows everything is set to look at the C: so if I want to install something on the D: it doesn't show up in my programs folder or anything. Is there away to get the two drives linked so if I install something on the D drive it will show up within windows?

Thanks