here is the MSVBVM50.dll you need to install for using the bruteforce tool on win7 x64 ..
http://rghost.net/42073296
the tool is very easy to handle if you know how to do it .. there are already keys for up to 1000 games included ..
just put your save- game to a "savedata" folder and open the bf tool ..
if the key doesnt appear automaticly just click on bruteforce ..
in some cases the tool will ask you to insert a eboot.elf of the game you want to bruteforce .. it needs to be an .elf (decrypted eboot.bin)
wait for a few minutes .. and voila magic ..
now just click pfd decrypt --> update --> encrypt --> verify .. and your save game is done ..
disc_hash keys are only used for modding a savegame .. they are not needed for resigning a savegame to your console
have fun ..