Well,there is a way to do it , if you live in US
1)You could transfer your money in your Alertpay account to you bank account ( of coz it could you some money for the charge by Alertpay )
2)You withdraw your money from your bank account to your Paypal account

and thats it.
be careful though,if you get caught by Paypal,your account has high posibility to get frozen.