not so.. remember ive JUST got a 1541 so ive already been through the process of filling up my tape collection from downloads.
for .prg files (single loaders) use wav-prg to create the sound file to play and record
for .tap files 1:1 copies of the original use 64tapvoc to convert to a voc file then use goldwave or similar to play and record. If by chance the resulting recording doesnt load on the c64 then use goldwave to invert the wave form and try again. Ive had 100% success with this