GameFAQs and other emulation forums package save files in compressed archives to save space. You must use a program like WinRAR or 7-Zip to the actual .max , .cbs , or .psu file out of the folder before trying to import it into PCSX2.
You are using a PAL save for an NTSC game, or vice-versa. Corrupted File: Re-download the file. tekken 5 all characters save game pcsx2 link