I just did this last night and worked a charm.Sponsored Links
DoctorA: That filesize sounds right, open it in notepad and you will see whether it says 1.50. or 1.51 etc. That way you can see what the actual update is, worked for me when I had different versions of it.
Gangley: What you have to do is get a copy of the update eboot file and put it in an UPDATE folder in the GAME folder on your memory stick. Now when you go to your memory stick it will have Update (version) and you can run it.