tell me how can I make OZP for new mini-cards?

it’s .png file, you can write a tool or use any hex editor to remove first 4 bytes and rename to .png

it’s .png file, you can write a tool or use any hex editor to remove first 4 bytes and rename to .png

can you show how this is done :)?

Thanks, it turned out :)

Thanks, it turned out :)

Did you find any answer or way to open them?

MuOnline Img Convert Tools 4.0.1
OZP To PNG and PNG To OZP

http://tuservermu.com.ve/index.php?topic=19663.0