problems extracting rar

ok, i followed the tutorial for extracting a rar file to the pin. I tried to download and "extract here" like the tutorial said, but a message came up and i think it didnt work right, i dont know. i ended up with: legend of mana.ccd and legend of mana.cue
i dont know much about all this, and i dont have an emulator yet.the message:
WinRAR: diagnostic messages
unexpected end of achieve
Post Merge: [time]1285261944[/time]
actually, i didnt add this to my original problem, but its says:
CRC failed in legend of mana .img. the file is corrupt

the file did not download properly, delete it and try again.

what if i dont have the points for it?

Replying to #3

You can re-download your file as long as you download it within 24 hours & it'll cost you no additional points whatsoever.