make copy of UO directory for safety, my copy is named c:\UO_Copy used in following commands
 
  make a subdirectory named c:\UO_Copy\Temp
 
 you need mulpatcher and LegacyMULCL-N in the temp directory from download at above web site
 
 copy  artLegacyMUL.uop  to C:\UO_Copy\Temp  directory
 
 Temp should look like this 

 
 
 open a command window
 
 cd  C:\UO_Copy\Temp
 
 LegacyMULCL-N.exe -x c:\UO_Copy\Temp
 
 Now Temp looks like this 

 
 
 note you have art.mul and art.idx now .. this is only file type mulpatcher works on
 
 I apply justnotrees.zip  so download that zip
 
 move the unzip file ART_justnotrees to the Temp folder
 
 now Temp folder looks like 

 
 
 start mulpatcher
 
 click on settings tab at bottom, sometimes you have to make window bigger to see tabs
 
 in Art secion (second column top place) click the … and pick your artidx.mul and art.mul files that you made when you ran LegacyMULCL-N in step  6 

 
 
 Click Load and wait a minute while it loads
 
 click on features tab 

 
 
 in Autopatch section select justnotreesOSI.txt  file that is in your  c:\UO_Copy\Temp\ART_justnotrees directory 

 
 
 in drop down pick Art (s)
 
 * Mulpatcher should look like this 

 
 
 Press start
 
 * Success will present this 

 
 
 click OK
 
 Back to Settings tab 

 
 
 In that art section you did load in step 12, you now want to do save
 
 Save back into Temp .. you will probably have to change up 1 directory because the save is going to open in the justnotrees directory 

 
 
 It will save 2 times, once for Artidx.mul and once for art.mul
 
 Done with mulpatcher. click close box(edited)
 
 now have to convert those mul back to uop, but it wont write over your c:\UO_Copy\Temp\artLegacyMUL.uop file so you have to delete  c:\UO_Copy\Temp\artLegacyMUL.uop first
 
 back to command prompt
 
 run LegacyMULCL-N.exe .\  in command prompt result will look like 

 
 
 Now you have a NEW c:\UO_Copy\Temp\artLegacyMUL.uop  file

 
 
 copy this c:\UO_Copy\Temp\artLegacyMUL.uop back to c:\UO_Copy\artLegacyMUL.uop … Maybe save your old c:\UO_Copy\artLegacyMUL.uop  file first(edited)
 
 Change your RE startup to point to client in UO_Copy .. fill out all the stuff based on your server 
