i need help with .LTB and .DTX

[HackMod]

here's the story i open the Rezxtract and i got the GUNS_M_PV_SMG i
extract it and complete then i go to the folder and open the folder with
all the guns all the guns says sample:PVMSH_UMP.LTB then i change
it into PVMSH_UMP.DTX so i open DTXConvert.exe and covert PVMSH_UMP.DTX then i littecth somethign like that and nexon the file
then i open the photoshop cs5 and keeps sending files sending like this
it couldnt complete with the medula interface and i did everything
to changed it help me plz

[Aznhaxor]

change it back to ltb