I'll try to answer you...
First you must get this files
1.-
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2.-
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Then:
1. Create a l2 edit folder, copy and paste the files that you wanna edit
2. Go to DOS
3. Go to the folder where you have the *.dat File that you want to edit
4. Write in the DOS windows
C:\l2edit\l2encdec -s systemmsg-e.dat
5. l2encdec will create a file like "dec-systemmsg-e.dat"
6. We must change the file name from "dec-filename-e.dat" to "systemmsg-e.dat"
7. Run the l2dat_full.exe, choose from the list the file (l2encdec file decodificated), doing click in
DECODE Buttom.... Like this:
8. L2dat_full.exe will create a file "systemmsg-e.txt". This file is decodificated completly.
9. Open this file with any txt editor and change whatever you want.
10. Run l2dat_full.exe, choose from the list the file and click
ENCODE Buttom to codificate again
11.L2dat_full.exe will create a file "systemmsg-e.dat"
12. Go to DOS Window again and write C:\l2edit\l2encdec -h 413 systemmsg-e.dat
13. l2encdec will create a file "enc-systemmsg-e.dat" codificate completly like the original.
14. Change the file name like original from "enc-systemmsg-e.dat" to "systemmsg-e.dat"
15. Overwrite the original file to edit file and VOILA!!
If you have any question PM Me.. I hope that this help you...
SORRY FOR MY BAD ENGLISH.. I tried to do the best!!