Yes you can. It's on it's way!
EDIT: The file is decrypted, so I'll try a fresh decrypted copy.
EDIT 2: Oh, the decryptor doesn't decrypt the plugin, so it looks like the only way to change it would be to use the custom one. That means you'll have to use custom icons if you want to change it.
The custom one uses a 2.50 topmenu_plugin with the extra icons added and re-linked at the end of the file.
If you could make some custom ones, or find a preset somewhere, that would be fine. You can hex that or send it to me.
If you're converting, replace the two .dat files in the program's reosurces with the ones in this archive:
http://psp3d.com/attachments/media/9...sp-iconfix.rar