Nice work.. To save some typing you might change your batch to something like this loop for finding your source. FOR %%I IN (D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z) DO ( IF EXIST %%I:\WIN51IP.SP1 SET CDROM=%%I: ) Same for: FOR %%I IN(.blt,.cue,.diz,.eml,.iss,ETC,ETC...) DO ( ASSOC %%I=txtfile )