Tried JBI(Java Business Integration): Failed

It is being long I was keeping an eye on Java Business Integration of which recently 1.0 version is being released, And I must admit this is excellent idea, this thing can really fly as co-operates are spending hefty amount of $ in SAO technologies products(to name few TIBCO, Webmethods)
recently decided to try the latest 1.0 version, But couldn't try, anyone can see the following screen and easily guess why I couldn't



Yes, I simply don't have Sun app server on my system, But this time Sun's installer will not guess even this small thing, To be honest I really fail to understand why they can't learn from there earlier product installations and why everything should be started again & again from ground
I feel like asking them following questions
a) For windows why can't you use MSI when Java standard edition SDK is already using it, But rather you create a complex java GUI which takes years to mature ?
b) Why there is no manual installation steps or even readme or help file in installation zip? Yes I have seen installation link on web
c) Why can't I use the other app server? And why shouldn't you see which application server have highest market share and first make auto installation for them and rest can have manual installation.

Overall I am really disappointed bcz not able to try few demo's under it.
Anyone any lucks?