Edit: Found the address for the mercenary points, and made a code to test for changing it... after I'm done I will add it in a new post in this thread.
It is the 00000560 address. With the values of; 00 00 27 68 (starting from the left most part).
The only reason I know it is the right spot is because when I change it to; 00 00 FF FF (in advanced mode) the Mercenary XP becomes 65 535, as intended.
The quick code that I was trying to use was: 20000560 0000FFFF
I'm not going to lie, I have no idea what I'm doing.
Edit: definitely more difficult making your own code than it is using someone else's template and item ids.
Edit2: I suppose I should add that I have 26 663 xp points so far, and while it's all well and good that it converts to 68 27 in Hex, when I did the search in advanced mode the numbers were backwards... which I thought was pretty weird.
Description: 65 535 Mercenary XP
Comment: 1st Sergeant TEST play 1 match to update your rank
Code: 10000562 0000FFFF
Now I just have to try changing the other ones around and see if they work.
Description: 264 599 Mercenary XP
Comment: 2nd Lieutenant Test play 1 match for Trophy?
Code: 20000562 00040997
Description: 3 000 599 Mercenary XP
Comment: Marshal Test play 1 match
Code: 20000562 002DC917
I figure these codes should force the game to let you skip a lot of ranks in the Mercenary mode, assuming it adds to the modified total of Mercenary Points, instead of replacing it with the last known "good" Mercenary Points then adding the latest to that total... but I won't know for sure one way or another until my friends get on to play a Mercenary match with me.
PS: I really appreciate all the work you guys do to give us new codes for all these games that Save Wizard has already done, but didn't make all the codes that people were asking for. The templates and item id tables you leave for people to use to make their own codes are awesome.
Using them after beating the game will delete all of your guns, and statistic progress, so you can't go and complete a mission afterwards to get them all back.
If you have beaten the game you will need to start a new game, play a Mercenary match to gain some points, then apply the codes to your 2nd save file.
Edit: I'm not even sure if it would work on a fresh save or not.
I do know that I tried making a save for slot 2 and it wasn't showing up in SaveWizard...
So that just leaves me with replacing my main save with a fresh one for further testing.