Ok here is my best shot at a guide to get edge working for all of us still on the old legacy plan. Using windows:
1)Upgrade to 1.1.4 then use ziphone 2.5 to unlock jailbreak and activate see here:
http://www.modmyi.com/forums/showthread.php?t=55591
2)On your phone go to installer and add source i.unlock.no
3)install "ziphone.ibrick.fix"
3)install "BSD Subsystem"
4)install "Open SSH"
5)Download and install on your computer WinSCP
if you are not familiar with winscp go here:
http://www.hackthatphone.com/112/iph...2_windows.html
6)access the phone with user name "root" and password "alpine"
7)go to root/system/library/carrierbundles/unknown carrier
8)copy the file "carrier.plist" to your pc
9)go root/system/library/carrierbundles/att_us.bundle and copy the file you just took from unknown and past it over the current file.
10)if you still have your old proxy.pac file that you used before just paste it into the directory private/var/root
If you dont have this file see this post:
http://modmyi.com/forums/t/6386-old-t-blue-mmode-settings-iphone-post79100.html
Ok almost done!
12)Go back to your phone and go to settings/general/network and you should now see an edge option on the phone. Change APN to "proxy" leaving username and password blank.
Turn you phone off and on and You should have a Phone running 1.1.4 with the old mmode settings.
Sounds like alot but It should take you less than an hour to complete all these steps.
Good luck!