Need help to create a custom event

If I understand point 2: let say I load map 3a(figaro throne room) I convert the number of the tile (101,41) to hexadecimal? it give me 65 29

That is right.

How can I load a map with a higher number than 9F?

The command 6B take 5 parameters the first two being the map number. Example: For map 145, it think would be 6B 01 45 XX YY ZZ, XX YY being the position of the party and ZZ is reserved for some flags. You should refer to the event dump for examples of the command being used and compare with the values in the hex editor. I haven't done events in month so I don't really remember.

CC9AED 6b 84 (4d 01 3f) 07 40 42

Here your problem is most likely that the game interpret you 6B command as 6B 84 4D 01 3F, so I think it load map 14D because there is an AND 0x01FF on the map number (2 bytes).