make a copy of your wow folder, and then downgrade one of folders.
how to downgrade:
go to data folder
delete all patch.mpq(patch2.mpq patch3.mpq .. etc)
go to wow folder, launch repair.exe use check and repair files function, and wait till it will be done
then repatch to version witch u need (magic-wow is at 3.2.0(10314) atm)
then go to data/enUS(gb or w/e version u use)/ open file realmlist.wtf, delete everything u find there and enter this : set realmlist logon.magic-wow.com
then go to web:
http://www.magic-wow.com/ make an account.
launch wow.exe(from your folder, dont launch launcher.exe cuz it will upgrade ur version to retail.)
log in, choose magicwow realm, make char in horde side, /w extrapriest or ripeer or soultrin or leeke for inv to di, enjoy!