An instant NT password cracker

Yeah, I am aware of the file sizes that one would have to encounter and this link that i had mentioed earlier, has plugins for various other hash algorithm too.

Also the precomputation time is just too large. even for a seven character alphanumeric password is 200+ days and file size of around 20gb.

But what i wanted to ask is that, is it worth the effort for even 7 char password. the reason why i am asking this is that often people have observed collisions in these hash algorithms (reference hxxp://www.cryptool.de/). Keeping these too in mind, would it be helpful while patching codes, in which the files itself are checked for modifications while using these algorithms, like it was done for crc ?