Conversion of 003 files to zip file format
Generally speaking, various compressed archives can be simply repacked between different formats, so something like 003 to zip conversion is certainly doable. It's usually a matter of extracting of the original files from the archive and then compressing it to the desired format. In case of multi-volume archives, all pieces are needed of course.
Open 003 file
Open ZIP file
Related software
Popular open source file archiver with a high compression ratio
A free open source archive utility
A backup and archive utility
Mac version of the popular utility
One of the oldest and most popular shareware file archiver and data compression utility
Another popular file archiver and compressor
A Linux application used as frontend for popular compression tools