Virtuemart configuration - Joomla 1.7

We have virtuemart 2 installed on a joomla 1.7 platform. We need to have the payment plugins configured and also the shipping elements completely removed as our website provides services therefore no shipping is required. We would like our clients to be able to make payment for the products through paypal and also our Chinese clients to be able to make payment through Alipay. When the visitors to the website have chosen their products and added their selection to the cart they then go to the cart/checkout to make payment we would like the shipping messages and selections removed as previously mentioned. Also currently it is not clear where the user needs to fill in their username and password to login or where they need to register if they have not already done so already. This checkout page needs to be set out so that it is far easier for the user to see what they need to do to login / register etc in order to proceed and purchase their chosen products. There should be for example login fields with a "click here to register" "Forgot your username?" "Forgot your password?" links if they have not already done so. The login and password fields should look the same. Currently they are appearing in different colours. Also if possible we would like China based clients with Chinese browsers to be automatically directed to the Chinese version of the site. We have Falang in stalled but default language is English. We would like the default to be browser/location specific. We would like this site to be excellent so if you have any other thoughts or design ideas to improve the site we will be happy to hear them.