Hi got a problem,...
I installed this mod, I have the following set-up:
Zen Cart 1.3.9f, MySQL 5.1.49, PHP Version 5.2.17
install went ok, had to do the &, (space ampersand comma) thing to ensure was not pushed over too far, that's ok.
I have the following as the settings:

Enable PostCode Method True

Calculation Method Price

Tax Class --none--

Tax Basis Store

Sort Order 0

Zone 1 Post Codes
LEAVE EMPTY

Zone 1 Shipping Table
10.00:0.00,59.99:3.76,9999.99:0.00

Zone 1 Handling Fee
0

Zone 2 Post Codes
AB31 &,AB32 &,AB33 &,AB34 &,AB35 &,AB36 &,AB37 &,AB38 &,AB40 &,AB41 &,AB42 &,AB43 &,AB44 &,AB45 &,AB46 &,AB47 &,AB48 &,AB49 &,AB50 &,AB51 &,AB52 &,AB53 &,AB54 &,AB55 &,AB56 &,KW1 &,KW2 &,KW3 &,KW4 &,KW5 &,KW6 &,KW7 &,KW8 &,KW9 &,KW10 &,KW11 &,KW12 &,KW13 &,KW14 &,PA21 &,PA22 &,PA23 &,PA24 &,PA25 &,PA26 &,PA27 &,PA28 &,PA29 &,PA30 &,PA31 &,PA32 &,PA33 &,PA34 &,PA35 &,PA36 &,PA37 &,PA38 &,PA39 &,PA40 &,PA41 &,PA45 &,PA46 &,PA47 &,PA48 &,PA49 &,PA20 &,PA42 &,PA43 &,PA44 &,PA60 &,PA61 &,PA62 &,PA63 &,PA64 &,PA65 &,PA66 &,PA67 &,PA68 &,PA69 &,PA70 &,PA71 &,PA72 &,PA73 &,PA74 &,PA75 &,PA76 &,PA77 &,PA78 &,PH17 &,PH18 &,PH19 &,PH20 &,PH21 &,PH22 &,PH23 &,PH24 &,PH25 &,PH26 &,PH30 &,PH31 &,PH32 &,PH33 &,PH34 &,PH35 &,PH36 &,PH37 &,PH38 &,PH39 &,PH40 &,PH41 &,PH42 &,PH43 &,PH44 &,PH49 &,PH50 &,KA27 &,KA28 &,HS1 &,HS2 &,HS3 &,HS4 &,HS5 &,HS6 &,HS7 &,HS8 &,HS9 &,ZE1 &,ZE2 &,ZE3 &,ZE4 &,IV1 &,IV2 &,IV3 &,IV4 &,IV5 &,IV6 &,IV7 &,IV8 &,IV9 &,IV10 &,IV11 &,IV12 &,IV13 &,IV14 &,IV15 &,IV16 &,IV17 &,IV18 &,IV19 &,IV20 &,IV21 &,IV22 &,IV28 &,IV24 &,IV25 &,IV26 &,IV27 &,IV28 &,IV29 &,IV30 &,IV3 &,IV32 &,IV33 &,IV34 &,IV35 &,IV36 &,IV37 &,IV38 &,IV39 &,IV40 &,IV41 &,IV42 &,IV43 &, & &,IV44 &,IV45 &,IV46 &,IV47 &,IV48 &,IV49 &,IV50 &,IV51 &,IV52 &,IV53 &,IV54 &,IV55 &,IV56 &,IV57 &,IV58 &,IV59 &,IV60 &,IV61 &,IV62 &,IV63

Zone 2 Shipping Table
25.00:5.50 &,50.00:9.50 &,75.00:15.50 &,100.00:17.50 &,150.00:25.00 &,200.00:35.00 &,300.00:40.00 &,400.00:50.00 &,500.00:60.00 &,600.00:70.00 &,10000.00:0.00

Zone 2 Handling Fee

Zone 3 Post Codes
BT1 &,BT2 &,BT3 &,BT4 &,BT5 &,BT6 &,BT7 &,BT8 &,BT9 &,BT10 &,BT11 &,BT12 &,BT13 &,BT14 &,BT15 &,BT16 &,BT17 &,BT18 &,BT19 &,BT20 &,BT21 &,BT22 &,BT23 &,BT24 &,BT25 &,BT26 &,BT27 &,BT28 &,BT29 &,BT30 &,BT31 &,BT32 &,BT33 &,BT34 &,BT35 &,BT36 &,BT37 &,BT38 &,BT39 &,BT40 &,BT41 &,BT42 &,BT43 &,BT44 &,BT45 &,BT46 &,BT47 &,BT48 &,BT49 &,BT50 &,BT51 &,BT52 &,BT53 &,BT54 &,BT55 &,BT56 &,BT57 &,BT58 &,BT59 &,BT60 &,BT61 &,BT62 &,BT63 &,BT64 &,BT65 &,BT66 &,BT67 &,BT68 &,BT69 &,BT70 &,BT71 &,BT72 &,BT73 &,BT74 &,BT75 &,BT76 &,BT77 &,BT78 &,BT79 &,BT80 &,BT81 &,BT82 &,BT83 &,BT92 &,BT93 &,BT94 &,IM1 &,IM2 &,IM3 &,IM4 &,IM5 &,IM6 &,IM7 &,IM8 &,IM9 &,TR21 &,TR22 &,TR23 &, TR24 &,TR25

Zone 3 Shipping Table
25.00:5.50 &,50.00:9.50 &,75.00:15.50 &,100.00:17.50 &,150.00:25.00 &,200.00:35.00 &,300.00:40.00 &,400.00:50.00 &,500.00:60.00 &,600.00:70.00 &,10000.00:0.00

Zone 3 Handling Fee

Zone 4 Post Codes
JE1 &,JE2 &,JE3 &,JE4 &,GY1 &,GY2 &,GY3 &,GY4 &,GY5 &,GY6 &,GY7 &,GY8 &,GY9 &,GY10

Zone 4 Shipping Table
25.00:5.50 &,50.00:9.50 &,75.00:15.50 &,100.00:17.50 &,150.00:25.00 &,200.00:35.00 &,300.00:40.00 &,400.00:50.00 &,500.00:60.00 &,600.00:70.00 &,10000.00:0.00

Zone 4 Handling Fee

the only part that seems to be working is the "zone 1 shipping" nothing else. I have made sure that there are no extra spaces between the postcode listings & i have made sure that the post code inserted for testing is a full & complete one ie:AB31 4AB

I have got zones setup for UK counties but I inserted those individually myself I did not use a module of any kind. I have got Ceon URI Mapping (SEO) installed, does that hurt it? hope not. any clues anyone? Any help would be greatly appreciated. hope to hear soon....

regards,
ed