Best protection?

[GarenaFather]

i found this map that cannot be open be MPQ Editor Read-mode...
Any other ways?

[GeorgeMots]

Fix the header of the map with a Hex editor.

Quoting:
Update - Damaging the MPQ headers (For advanced users):
The first four bytes of the map hold the filetype-identifier (usually "HM3W"). We'll leave that and the next 508 blocks alone. The next four (4th, 5th, 6th and 7th) bytes always hold hex: {0×00 00 00 00}. The following 508 bytes hold the map name, some data with unknown purpose, some more nullbytes and then finally, after byte 512 the MPQ file begins with "MPQ " and hex {0×20 00 00 00} Which is actually another (but smaller) header, and we can damage it:

Leave the string "MPQ " alone, and change hex {0×20 00 00 00} after it to hex {0×33 49 43 45} (We are at byte 516 now) and MPQ extractors will fail to open the map. Warcraft does not look at this information, so your map will be still playable. This method effectively crashes most deprotector scripts and programs, but any knowledgeable user can reverse the effect within seconds so it'll only help against beginners (People who don't know about this header corruption method).

Just do the other way around or grab one of the hacked versions we have around here.

[GarenaFather]

Nope not working

[GeorgeMots]

Well thats the way i do it. If you fail, you got to be doing something wrong. Like i said try hex editing the other hacked FOC we have here to see the difference.

[cold_moon]

This map was unprotected.