Eliot wrote: Did you try to play a bit with the width parameter?
It should give results.
Remove
clear: left; in frontend_default.css and now it shows 1, 2 or 3 products in a row, depending on screen width.
.row-fluid .hikashop_product_column_1, .row-fluid .hikashop_category_column_1, .row-fluid-7 .hikashop_product_column_1, .row-fluid-7 .hikashop_category_column_1, .row-fluid-8 .hikashop_product_column_1, .row-fluid-8 .hikashop_category_column_1, .row-fluid-10 .hikashop_product_column_1, .row-fluid-10 .hikashop_category_column_1 {
margin-left: 0 !important;
/* clear: left; */
}