Custom Magento API

i need someone to create me a custom api in magento. basically i need magento to pass me all orders greater than the increment id i supply it with. i need it to do it in one call. so like this:- i give magento order #456789 it returns all orders greater than and including #456789 inside a single array. i can then use this data for my .NET app. we can get this info at the moment using [login to view URL] and [login to view URL] but i need them combined so it only uses one call. if you can combine both of these methods so it uses just the one call then that's good This is a good help to create one: [login to view URL] I have a budget of $150. Any bids over this will be ignored.