O.K. sorry for the long reply time, but I was waiting for a friend to get back from holiday.
I remember him working on my PS1 to region free it in the past so I thought I would ask him to take a look too, he converted DGJ-V using 'Popstation GUI' so he tells me, and it's working fine. So I guess I just can't use ones made on PSX2PSP or something without having to mess with version of Popsloader and such *shrug* I'm really not sure why that is the case though.