Software Deployment

Seriously...... you need to get yourself an authoring tool - wise or install shield

and a training course, and that book that vbscab recommends - The definitive guide to windows installer by Phil Wilson

it'd help if you told us which app and what your trying to achieve. I would expect the servername to be a property

The Application is basically an agent install where when i run the setup it will prompt for a server name and after providing the server name it will ask for a proxy settings connection
in the next box
The server name will be TESTSERVER
where as there is no settings for the proxy connection and its blank so i click next to ignore it while doing a manual install.

If I edit the msi file i am wondering where does these fields go. As said I edited using orca but not sure how to fit it.
If this does not work how will I create a transform for the existing msi package Can you provide some site where I can know the exact steps I have browsed through some areas in the internet but not got the exact thing which i wanted for.

One, avoid changing the MSI directly: create a transform. Two, timmsie is right. You need to learn some fundamentals first and Phil Wilson's book is an excellent start. After that, a training course on your chosen authoring tool will serve you well.

Lastly, if there was an online resource that took you through the required steps, you can be sure there would be a link to it posted here on AppDeploy.

I'm pretty sure I actually DID post a general walkthrough once for these types of operations, what tables to look at etc..
I'll be damned if I'll repeat it though, there's a search function on the forums [:)]

Regardless, if you want to do MSI authoring without the constant feeling you want to pull out all your hair, you really should invest in an authoring tool, as Richard and Ian suggested.