Applying PPF patch to PS2 game on PS2HDD

[VSUB]

Sorry if this the wrong place but I don't know where is the correct place.
My question is...is there is a way to create ppf patch for PS2 game and to apply it by connection to my ps2 via network adapter.

I can make image of the game to my pc hdd and rebuild the game but I don't want to remove and place the game again to my PS2HDD for something so simple.

The whole patch that I want to create(and I don't know how)is changing one digit from 2 to 1 inside the game elf

This is the address inside the game elf
0x004B85B2 the value is 32 and I want to make it 31

I know that I can create a patch by comparing two images(patched and unpached)but I don't have free space for two copies of the game and also I think it will take a lot of time to compare two 4gb images

Edit:Ok I made the patch by using PPF-Studio(General Tab)and two images(original and modifier...I actually changed what I need by just hex editing the image).
Now,is there is a way to patch the game without unplugging hdd from my PS2 and connecting it to my pc

Edit2:I already patched that game on my PS2HDD