Actually that problem is solved but the BIGGEST problem for me right now is that Zen Cart doesn't support dimension for any shipping module.

If you offer USPS Express, UPS 3 Days, 2 Days, 1 Day or Overnight and your package is bigger than 10 x 10 x 10 you're going to see a HUGE discrepancy between Zen Cart quotes and actual price from UPS. This is actually affecting our bottom line so bad that we are considering not offering express services until Zen Cart includes this feature or we can figure out a way to technically solve this problem.

We've attempted using table rate to configure express shipping but that hasn't work as desired because it is not flexible enough.

It would even be nice if there is a feature to charge handling fee per shipping option (1 Day, 2 Days, etc.). At least that would provide a poor man's solution :)

This is major headache for us.