ok this is for WA not sure about others.
1) Create a new file on you desktop - call it sword skins or something
2) go to C:\Program Files\Games-Masters.com\CABAL Online (EU)\Data\Item\arms
3) copy file 2h_bld_06 and 2h_bld_09 to the new file on you desktop...these are backups so dont loose them
4) rename the 2h_bld_06 to 2h_bld_06(old)
5) rename the 2h_bld_09 to 2h_bld_06
6) copy the 2h_bld_09 file from the new folder you made and paste into the Arms file.
next
1) go to C:\Program Files\Games-Masters.com\CABAL Online (EU)\Data\FX\EFX\Arms
2) copy the 2h_bld_09 and 2h_bld_06 files and paste into the desktop folder
3) you should now have 4 files in the folder on your desktop
4) repeat steps 4 - 6 of the above but with file files ending .efx
this should change your images of osmium Greatsword to look like lycannus
Have Fun