You will probably need to post a pic, that way people are going to be more likely to give ideas on where/how to mount the LCD. I am building a custom section of console for my project. It is alot of work, but keeps everything intact.
I am using an adapter that allows you to use the cd changer inputs as auxillary inputs on my Toyota's stock stereo.
www.rcainput.com for the adapter, they are a bit expensive at this site but are the cleanest looking assemblies for the adapter.