who's work? if it's shared then i lost 5 days.
I found no info at all while doing this, had to figure everything out.
Because everyone say it was impossible to compile, i went the increase .u size way. Lost a few days coding a decompiler/size fixer.
All i had was edkit patch for rpg-club and it did't look like it was a hex work, so i started thinking how to compile and then how to insert the code.
I went the extending way. Now that i understand everything better, i can tell you Edkit is compiling interface.u entirely.
I could do that too, but takes a lot of time to fix all int64 operations for classes i will probably wont use.
Any ucc.exe works, if you have the l2ucc or any ucc with int64 support (which i dont) it would be really easy to compile entire interface.u
If not, extending is just as easy.
good luck.