Not sure what do you mean (brief translation of what? and why to change something that is already really good - I mean, why would someone want to change the original translation? except for some rare cases where it cannot be avoided - battle log).
But *yes*, it *is* possible to play this game in English. That's the *main point* of this project
.
Any translation is possible. I just say, that since image has to be rebuilt, ppf won't simply do. Even if the resulting files were smaller in size than original, japanese ones (this happens quite often - this is why the patched image's size is a lot lower), it still would have to be rebuilt due to the way the lba/size table is made. Only every 16th entry has direct starting sector specified. For all files in between, the game takes the last direct sector and adds sizes of all previous files to get the resulting sector. Plus you can't cheat too much on sizes, because of the way the uncompressed and compressed size is taken into account when allocating memory (seems that buffers do overlap, so when the game is decompressing last bytes of input buffer, the output has already overwritten most of the input

). This way if you cheat too much on sizes to make everything match the original ones, it's possible that you effective "compress ratio" (real size of compressed data to declared size of uncompressed data) will be high enough, that you will overwrite input before it gets uncompressed. There is a cheat for that - if the compressed data is smaller, then leave the compr size as is and increase (right, increase) declared uncompressed data size (it won't affect the unpacked file, as the decompressor takes the real value written in file). This way the output buffer will begin much lower in the memory, so when you decompress the file, it will never overwrite the compressed one). The problem is that in some cases it could cause all kind of weird problems (eg. you may run out of memory).
So: yes, any translation or conversion is possible (just download the patch and see for yourself).
A big no-no to the ppf. You would have to produce files that are always smaller in size than original and do some nasty things with the sector/size table, that could cause all variety of weird problems.
PS. Stop posting like that. Every single sentence in separate post. It's not an IRC.
PS2. Why is custom rebuilder/patcher that bad anyway? Sure, it kind of binds you to windows or platforms you can get some substitutes of it on... But I guess it is possible for the final patch to come in nice src package, so it will be easily compilable for any system you like.