Hey, new member here.
I have a c240 and have spent the last few hours going through the threads here and searching elsewhere online. I think i finally found a solution for my v1 which was giving me the same errors as the o.p. of this thread was getting.
I found this from another site:
http://forums.sandisk.com/sansa/board/message?board.id=c200&thread.id=2028this is for the early firmware, so I'm not sure if there's any disadvantage to this opposed to the newer firmware versions. Bottom line is that it WORKS. i just restarted the player and Rockbox is definitely there. The only place that I got an error in the graphic installer was when it was trying to install themes. Do the themes not work for the earlier firmware versions? not a big deal really but it would be nice to know.
I'm not sure if this solution has been already covered, but after searching, i never saw it, so I thought I'd share.