I would like to set up several flat shipping rates based on the order total and I'm not sure the best way to go about it.

Here's what I'd like:

us and canada:

under $50: $2
50-99: $3
$100+: free

which I believe translates to this (look, i did figure out something!):

50:2.00,99.99:3.00,100:0.00

International (everywhere else) is the same, only instead of $2,$3, free, it will be $4, $5, $6.


Then I want a new set of shipping for those who want to upgrade from USPS first class..

US only:
priority: $5
express: $18

International (everywhere else)
Priority
express


What exactly do I need to do to make this happen? PLease feel free to use very small words and talk to me like a 5 year old -- ESPECIALLY if it involves zones and zone definitions!

I am using the latest zen cart
http://rainestudios.net/

thanks!
-amy