Magento: Further Customize our Magmi Import Profiles for uMarketplace Vendor allocation of products and auto price & stockproduct updates via datafeed

Magento: Further Customize our Magmi Import Profiles for uMarketplace (Multi-vendor software from unirgy) Vendor allocation of products and auto "price & stock" product updates via datafeed. We use Magmi (custom profiles and settings) for our XML datafeed integration (our two main suppliers offer us a datafeed of products, prices and stock). We need: 1. An additional Magmi Profile (for : A. Initial Import of product details, description & Images (we already have a custom XML importer which just needs to be adjusted) B. hourly or daily updates of stock & price of those imported products via datafeed (XML) C. Ensure that the imported categories are correctly aligned with our category structure. D. Ensure that the Magmi Import Profile is customized so as to allocate, via special product attributes, the imported products to a specific uMarketplace vendor.