[lera4285]

Go to:

/skin1/customer/main/products.tpl

Find the following code:

{if $usertype eq "C" and $config.Appearance.products_per_row ne "" and $config.Appearance.products_per_row gt 0 and $config.Appearance.products_per_row lt 4 and ($featured eq "Y" or $config.Appearance.featured_only_multicolumn eq "N")}

Change the 4 to 6 and save.