oscommerce various small implementations

******in order to avoid a security pop-up window, i wish to replace (i believe in [login to view URL] page) with ******on [login to view URL] there is a calendar on the left; i would like there to be 2 calendars (current month + next month) (one on top of each other) ******as the admin, i can enter name, firstname and a special password through [login to view URL] - for example i have a person on the phone who wishes to order a product (conference) - i have special privileges (example: i can enter a rebate on a price) in this area; i would like also as a special privilege to have an immediate visual of the customers list, so when i have someone on the phone i can immediately see how his/her name spells! ******i would like people to have the opportunity to leave their 1st & last name & email address and receive our weekly newsletter; ******right now i have a prospects database (who have never ordered conferences but receive the newsletter) and a customers database; it is complicated to have those two databases, i would like the prospects (newsletter recipients) to be immediately included in the same customers database but with a special status: not yet registered. if, let's say 3 months later, the prospect creates an actual customer account by placing an order, he will actually change the status of his existing 'not yet registered' account (and by the same logic get a password).