First select the items you wish to edit (item code) or item number then with dat editor load structure weapon/upper/lower or what ever you want to change, then look for the item code or easer for the item number, then search for LVL change to the level you desire, scroll down at the end there is upgrade change to 7 then save.
Now its time for client open item.str then item.dat search for the NUMBER ITEM ONLY of your item, then look for Lv change, look for slot change to 7 save.
and for last crypt your item.dat file (client) to edf, and the rest copy past xD.
Now if you wish to add options to items, in server side you have 4 columns weapon/armor etc and 5 columns for elems, you just add te ability then the %, at client side you have to add either the number of effects you will see the columns is very easy.
here is my list of effects i've figured out them yesterday hope it helps someone.
1. sp maximum increase 1= 100%
2. increase fp consumition when using skill 1= 100%
3. accuracy rate increase 1=1
4. increase damage avoidance increase 1=1
5. max hp/fp increase 1=100%
6. increase att 1=100%
7. increase def 1=100%
8. level up skill increase 1=1
9. sthealt
10. detect
11. removes damage protection skill
12. moving speed increase 1=1
13. show enemy vulnerability information
14. increase fp recovery rate
15. force attack power increase 100% =1
16. fp increase 100%=1
17. drain damage to hp 100%=1
18. drain damage to fp 100%=1
19. critical 1=1
20. range 1=1
21. defense 100%=1
22. debuff assisting time 100%=1
23. hp recovery rate 100%=1
24. dodge 1=1
25. delay launcher increase
26. force range 1=1
27. decrease critical 1%=1
28. success block 1%=1
29. all resistence 1=1
30. max hp increase 100%=1
31. debuff increse 100%=1
32. ignore block 1%=1
33. delay attack range increase
34. delay of skill increase
35. delay of force increase
for the delay you have to write - (minus) before number if dont do so it will decrease speed instead increasing.