shipping charges based on total cost of items

In Drupal 4.7 or 4.6 it was possible to set the shipping charges based on the total cost of items.

This would be very similar to what PayPal offers.

I cannot find anything like that in Drupal 5, using eCommerce 5.x-3.3. The user documentation downloaded with the module (docs/user/index.html) still mentions this options, but it is obviously outdated (screenshots are from Drupal 4.7 or earlier).

Calculating shipping using one of the major carriers is an overkill in my case (and I assume in most cases). A simple, basic, shipping calculation method would be very useful.

I used flexicharge in eCommerce 5.x-3.0, it was sort of working there (I could create only one flat rate, not based on total cost, and labelling was strange), but in 3.3 this is totally broken, not matter what, the flexicharge is not applied anymore.

Any suggestions?

Thanks,
Marius