yes you can do that with JDflasher. i tested it myself with a brown W600 CID49. you can't download brown firmware (i think). flash it with red firmware it doesn't make a difference. the firmware will be red and the erom brown but that's ok. if you had a CID36 phone you could've changed it to red using DCU60. when you connect your phone using JDflasher, i went in bflash and dragged the firmware over and it flashed it. then upload your custpack, let the phone start up. then shut it down connect it back to jdflasher and start patching (make sure you enter bflash for flashing and patching and bfs to upload your custpack and other files)