Hey.
Same as "Monkey D. Ruffy", I have one which works with bruteforce
and also with words of a dictionairy (don't know if you can modulate
it with own predefined words, I simply never tried it out).
How fast the programme is? It depends how fast your CPU is.
But no matter what. I think that it's the wrong forum to ask for
stuff like that. I'd either consult a hacker-forum (can't tell you
some because of the forumophilia-rules) or the second option
would be to ask the "
Federal
Bureau of
Investigation".
I think they got the best software as far for this which you can
get.
RAR passwords are pretty safe if you choose a long passphrase
with many foreign signs like "#+%§". If the RAR got a password
like that, I think even the FBI couldn't crack it in less time than a
a cuple of months.
Good luck out there.