Flux CDISCOUNT and other markets

CDISCOUNT product creation / product modification

We use Magento and Beezup to publish our product catalogue on CDISCOUNT
We need to create and modify products en masse.

First we wish to publish modify 553 products from one magento category.
We need someone who can modify all products previously created from these 553 products and to create those not previously created.
Products should appear on CDISCOUNT with all data and images as on our Magento store.