It's already in the game.
The higher your science skill the more words you can eliminate by mousing over pairs of brackets or parentheses or greater than/less than signs,
if stuff highlights in between the two you can click on it and eliminate a word.
At level 100 you find so many of these you eliminate every word except the password.
IE.
<^$#((@> [*#*@)(#$!@@%] {@$@#^^^###}
if you moused over any of those examples above, all of the stuff inside the < and > or [ and ] or { and } would highlight and you could click on it and it would eliminate
a word from the list, keep doing that (at science level 100) and you'll eliminate every word except the one you need,
sometimes you'll also replensish your attempts at hacking, so if you've tried three times, and mouse over one of those examples above,
sometimes it will say "Allowance replenished" and set your tries back to 4.
Other than that, which mods have you tried at newvegasnexus.com?