oscommerce tweaks

basically i have a few things i need looked at/fixed on a oscommerce 2.2 site. i have the one page checkout addon installed and i am having trouble getting it to work with paypal. basically what happens is that when a buyer clicks the checkout/pay button, they never get sent to paypal to make the payment and are automatically sent to the checkout success page. if i disable the one page checkout, then the buyer gets sent to the paypal payment page. so basically i would like to get one page checkout to work with paypal. also, when one page checkout is enabled, the order id does not show up in email that gets sent out. not sure if it is because the payment is never made, or if it is something else. the number shows on order emails if one page checkout is disabled. last, i would like the signup page designed a little better as the way it is right now, alot of the input fields are misaligned and does not look professional. just really need to clean it up and make it look better and to go with the site. would like to work with one person who can do all this work. please ask any questions you may have.