The patches should be applied to your ps1 backups which you are trying to swap.
Try to patch one of your pal game backups to "America" and for the "AR" try to swap it after "ImportPlayer" to change the video to PAL. Maybe it will fix the issue with half way up screen.
PS2 SCPH-70004 V12 PAL + HDCOMBO + 160 GB Samsung HDD + OPL 0.9.1
PS2 SCPH-70004a V13 PAL Satin Silver
2 x Official Sony 8mb card +FMCB 1.8c + uLE 4.42b
Datel Max Memory 32mb card +FMCB 1.8b + uLE 4.42
Memor32 + Memento FW 1.2e