Mask Processor Help

[mastercracker]

you cant, you have to run multiple commands

This answers the very last question about setting the length: 1 line per attack length/mask.

Now for the setup of the mixed charset, you just create custom charset like this:

mp64.exe -1 ?d?l ?1?1?1?1?1

This will cover any 5 character password containing a mixture of lowercase and numbers.