If type of listed files could be switched from 'do not compress' to 'compress', it would be easy to list either files you want to compress or files you do not want to compress using regexps or similar. Also, I think it could be nice to be able to specify maximum/minimum size of file that compression is used on (also there's not much sense to compress file smaller than one MTU
)
[*] Compress
*.txt
*.me
*.
*.nfo
*.1st
*.doc
*.wri
*.htm
*.html
*.xml
*.php
*.sh
Files smaller than 100Kb
To compress common text files.
Or:
[*] Do not compress
*.[r0-9][0-9][0-9]
*.rar
*.zip
*.tgz
*.gz
*.bz2
Files larger than 100Kb