I am looking for something to help me add features to suitecrm

I want to add a register payment at the bottom of the invoice
when i take a payment chq or cc i can have it adjust from total …show balance right on invoice

second request , see link … http://www.anhgolden.com/2012/12/sugarcrm-stock-and-inventory-module.html

I am looking to have this made as a module called inventory so can use it to track stock level and re-order , but also to remove it from inventory as we process a sale …

simply go to inventory and see the stock level, re-order would be a bonus
anyone here interested in helping me make this happen please contact me
thanks in advance