For users
+ user may to pay order from deposit on checkout
+ user may select payment method after checkout - on order information page
+ user may transfer funds (deposit) to another user
+ user may deposit shop account my payment methods
+ user may cancel paid order and return funds to deposit

For developers
+ helpers for extention design (see system\helper\multi_pay.php)
+ tools for payment modules design (see catalog\model\payment\multi_pay_tools.php)
+ simple integration in deposit payments and payments from ordeer info page

discuss:
Forum

Demo admin panel:
login - pass: demo - demo

Demo shop:
login - pass: demo@demo.ru - demo

Needs:
vqmod 2.0