I am glad to help you again~haha
Try using [PSP] Simple Popstation GUI v3.00 beta or PSX2PSP v1.2. Personally, I prefer the former. But either one is fine. I never really have any problems when converting PAL > NTSC. Try these programs out, check the "PAL fixed" and see how it goes.
Particularly, FF8 requires specific Game ID to fix random crash. Read Database Error (I posted maxconsole forum instead of pspmod because the former has discover various Game ID that works with FF8). Currently, most people use RE2 Game ID for FF8, fixed random crash, but lags big time. There are other Game ID like Dino Crisis that helps fix random crash, no lag, but at other expense e.g. crash when using zell's limit or something else, I cannot remember. Well, just read the maxconsole thread.
In conclusion, I would recommend you to try to get your hands on NTSC, since PAL screen is smaller and is sometimes distorted, sucks big time.