Well the tittle say the description haha
i try, in my ESPconverter, out more than 10 mods, but (13 haha) but i cant do it! what can i do for quit the restriction?
Here is mi "morroblivion.ini"
; Initialisation file containing Path and Files to use
; with Morroblivion ESP Converter and NIF Converter
; lines to be ignored begin with ";", to uncomment a line
; just remove the ";"; Morrowind and Oblivion paths, don't forget to change them
; if you did not install the 2 games in the default foldersMorrowind=C:\Program Files (x86)\Bethesda Softworks\Morrowind\
Oblivion=C:\Users\Usuario\Desktop\Morroblivion\; Master files to convert with ESP Converter,
; ignored by NIF ConverterMaster 0=Morrowind.esm
Master 1=Tribunal.esm
Master 2=Bloodmoon.esm
;Master 3=
;Master 4=
;Master 5=
;Master 6=; Archive files to use for conversion,
; used by both ESP Converter and NIF ConverterArchive 0=Tribunal.bsa
Archive 1=Bloodmoon.bsa
Archive 2=LeFemmArmor.bsa
Archive 3=Morrowind.bsa
Archive 4=Morrowind - Textures.bsa
Archive 5=Morrowind - Textures 2.bsa
Archive 6=Morrowind - resto.bsa
Archive 7=Vality's Bitter Coast Addon.bsa
Archive 8=Vality's Ascadian Isles Addon.bsa; Mod files to merge with during ESP/ESM conversion,
; ignored by NIF ConverterMod 0=Better Clothes_v1.1.esp
Mod 1=LeFemmArmor.esp
Mod 2=LOCH_Felsaad_Revamped.esp
Mod 3=Another Balmora 1.2.esp
Mod 4=Unique Banners and Signs.esp
Mod 5=Vality's Bitter Coast Addon.esp
Mod 6=Vality's Ascadian Isles Addon.esp
Mod 7=dxm_metallic_signs.esp
Mod 8=Clean Better Caldera.esp
Mod 9=Book Jackets - Morrowind.esp
i try to add "mod 10=; mod 11= and mod 12" but without results
sorry for my inglish, i known is not the best :S
Goodbye and thanks for read and do a reality util community, i like it very much 
EDIT: Oh i forgott to say, i have many textures replacers son i dont remember the names...
All of the textures replacers are inside of
Archive 4=Morrowind - Textures.bsa
Archive 5=Morrowind - Textures 2.bsa
This is just a guess, but since all other references are base on hex code, try "A" for 11, "B" for 12, and so on.
But, it may just be a hard-coded limit of 10.
I tried too... but the converter crashes, sometimes ir gives you an error, so it's not possible I'm afraid, do what I did select the 10 most vital mods for you, that will do it!
Seeya 
Tes4Gecko can merge Oblivion mods. Why not try it on Morrowind Mods and see what happens. It just might work, obviously depending on what sort of things are being merged. There is nothing to lose...