To clarify: your E-junkie account can only send payments to the same PayPal email for all products. This can be either your PayPal login email or any secondary email you've added to your PayPal account, but this is an account-wide setting, not product-specific.
If you have a separate PayPal Micropayments account, we can send order totals under $12 to that account instead of your regular PayPal account; you can provide your PayPal Micropayments account email in E-junkie Seller Admin > Payment Preferences.
If you don't want your PayPal email (whichever one you choose) to be shown on PayPal's checkout screens, upgrading to a PayPal Business account will allow you to specify a business name that would be shown during checkout; this account upgrade is a good idea anyway, as it also lifts the monthly receiving limits that PayPal imposes on personal accounts, among other amenities. However, I think the payment receipt email that PayPal sends to the buyer would still always show which PayPal email received their payment.