How to change guild dogi to any other ingame dogi?using specific program

you can't .

There is no way to change that dogi into other dogi's the Dogi's you mentioned were one's given from Wagu machines which is from the Cash shop if you want the Vegito dogi and such, use the wagu when they are in it or buy it off the auction. But there is a whole Forum specific to DBO texture mod's which I'm sure you could find a cool one for that Dogi if you look hard enough but note you'll be the only one to see it. but yea Look in DBOG's DBO - MODS forum under off topic they might have something you would like as a texture override I don't know how to or do i have a interest too but it could help you out.

if you mean the 7500 Zeni Dogi is named:

a_dogi_01_h_f.dff

h=human

f=female

you need to change the .dff of a_dogi_01 of your race. It is in obj.pak with the other dogis.

The tool can be found with a few more tutorials or infos about the dogis here (download the icon folder or dogi name list from there, if you want to replace it with a specific one):

Effies and Ledgards Mod Collection

you want to use the resource tool

https://workupload.com/file/8s3q2Dr