We are looking to use DropDMG for our products and everything seems perfect. I just have a small question, I was wondering if it is possible to have Regional Specific SLA attached to a DMG. Our software has two different EULA's for US and GB. That means we need to show English EULA twice one for English-US and Other English-GB. I looked into the language codes in /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/Script.h and en_US is 0 and en_GB is 2 (Region code) but I am not sure how you would use it with Rez tool.
Other possibility would be to leave the English menu enabled and give it some other name like English-GB and English-US but use the same language code twice?