The installer will work fine on 32-bit systems, but since 64-bit systems have a slightly different path name (i.e. instead of "Program Files" we have "Program Files (x86)"). Anyway, to make things short, go to Program Files, there will be a similar folder hierarchy (you know, the Square > FF7 etc..). There you'll the prp folder in which there are 00.lgp and 01.lgp
Rename 00.lgp to char.lgp, and rename 01.lgp to world_us.lgp (instruction taken from Weemus' post
The original files are located under data > field and data > wm in your correct installation directory. Back up those files first (in case something happens and you have to revert), then copy it over. Run ff7.exe as usual. It worked for me.
Edit: Regarding the Remix, if you have the time, I would recommend installing the mods one by one. For one, some mods included in the Remix is outdated, so if you want to get some of the newer stuff you still have to install those. Secondly, it's easier to find out what goes wrong while modding, because you install everything by hand instead of getting all the files modified by the Remix installer. Third of all, there might be a few bugs in the Remix (as far as I heard). That being said, the Remix is very very convenient and you don't need to get your hands dirty with all the different ways to modify files.