There is an existing bridge in SOAP between Oscommerce and vTiger.
Automatic creation of Lead when sign up on the website is already functional
1° create a product on vtiger with info from oscommerce + link this product to a Lead or contact (thanks to a ID)
2° General view (of Leads, products etc..) Around 100 rows instead of 20
3° Modify the All Menu (AllMnu) (general view per default) of either Lead, product, etc..
4° some more minor stuffs