hey...no problem...make sure u have latest c2d v2 (its included with full multiman zip)
then lookup ur "original CEX TargetID" e.g 84/85 etc...
check here>
http://www.ps3devwiki.com/wiki/Target_ID
put all required files into the "c2d" folder and type command:
c2d.exe eid_root_key.bin dexflash.bin cexflash.bin
85
(
85 is my ur original CEX targetID = Europe )
then write the command