asp.net technology assistance / advise

Dear all
i have got to prepare new project it is about this:

Write a program that is intended for a call center agent and enables him to record service calls from customers who have called the service center. The program must keep the client’s data and information about the problem so that the call center agent or any other worker in the organization can access the information and keep working on it.

i need help with choosing technologies???
i mean that if there is login form should i write it with table and in the middle frameset, or just in a table??
where to keep the user name in order to use it cookie??? session???
the client will have submission form with all the details and the call center will have datagrid elaborates all the calls that was mentioned by the clients.
any good recommendations????
can someone give me directions for good performance without burden the server????

The techology you use would be second behind getting all of the necessary requirements of the applciation.
The requirements may end up dictating exactly which technologies you can and can't use.

all the requirements mentioned above.
some additions
You must enable easy identification of new or existent customers. You must include as much information as possible regarding the problem, general information, location of the problem, time and date, and order number.
You may make assumptions regarding the organization, call center position, information flow procedures, or any other assumption. Please specify the type of organization and any other assumption you’ve made on a separate page.

1) Use a technology you are familiar with
2) Use a technology that can do the tasks that need to be done.