I had new vista home basic laptop...i need tp install iis 7.0 but i dono how to do it also then only i can locally web share my .net application for acessing it in localhoat can anyone pls help me??

I am running Windows Vista, and IIS version 7. I installed IIS, and I think checked it with hello.htm I have since installed php and MySQL. Now, from my browser http://localhost/*.php works fine, but http://localhost/*.htm gives an error HTTP404. I have double-checked that the filesnames are correct...