issues with powerstore and gateway modifications

hello
i am posting this new thread in order to sum up some questions i have while trying to change powerstore2 to work with paypal standard. I also own e-cart 5.

1. If i use paypal standard will the orders submitted by customers, be visible some how in the admin area? I mean changing to paypal standard will affect the orders appearing to the backend?

2. After changing the gateway to paypal standard, and creating the new checkout page, how is it possible to force the user to log in or register , if he is not already logged in, before going to the paypal site? Is there another way to make this work? or a runaround?
I noticed that at the default checkout page of PS, there is a username and password field for the customer to log in or register... But when my new checkout page is created via the checkout wizard of e-cart, these fields disappear.


3. I am not going to use any UPS, FEDEX, or USPS shipping providers, because the client is in Greece. I will apply flat rate shipping rate rules based on total order weight. I will also provide these shipping options:
a. Delivery by the post office
b. Courier Delivery

So if the user chooses the a. option, there will be the relevant rates added to the order total. Same happens if the user chooses option b. My question is: How can my client be notified in some way for the shipping option the user has selected?

Thanks in advance.

PS: Sorry for the many threads, i am just trying to solve problems that occured because of the fact that the e-shop is in Greece, therefore many modifications have to be made, and my coding experience is limited. I appreciate the great support provided by these forums so far.