What the heck? Why is this in the release section? Anyway it is not that you are forced to make an upgrade to 98 version with Aali's driver (since it will be the same game but with a better graphic output). You can use
uMod. The problem: while it dumps similar textures as Aali's driver except as input, it uses different file names (hashes) to replace them. Moreover, the backgrounds it dumps are kinda different and contain some garbage information. So you need to dump all field textures, split and convert the upscaled textures of a project your choice OR upscale the dumped textures, which is also not as easy as you may think, since the bg's are split in tiles and then you need to write the hash codes as the names of the textures.
I think the converter is the easiest thing to do. If you need the achievements, use blackchocobo or an achievement unlocker to unlock them manually. ATM you can have either good graphics or achievements, but both isn't possible (yet).