Before we start know that this router has the same exact hardware as a TP-Link TL-WR841N v7.x -- it is just re-branded as Rosewill.
With that said, This is how I did it:
1. download and flash "factory-to-ddwrt.bin" from ftp://dd-wrt.com/others/eko/BrainSlayer ... rnx-n300rt (this will put ddwrt on the router)
2. download and flash "wr841nv7_webrevert.bin" from http://www.dd-wrt.com/phpBB2/viewtopic.php?t=85237 (this will flash to stock TP-Link firmware) NOTE: bin is in rar file, and must be extracted (duh) and you need to be signed into ddwrt forums in order to see download links. When flashing choose "RESET TO DEFAULTS"!!!
3. Download and flash "gargoyle_1.5.8-ar71xx-generic-tl-wr841nd-v7-squashfs-factory.bin" from http://www.gargoyle-router.com/download.php. Rename the file to "factory-to-Gargoyle.bin" or similar before flashing. (This will put the latest version of Gargoyle-wrt on the router.)
-- Make sure you allow plenty of time for the router to recover between flashes. Other than that it should be pretty straight forward.
Hope that helps someone... BIG thanks from me to the Gargoyle team, OpenWrt and other contributors who make this possible!!!
