Any file archive format which...

Hi,

I am using Peazip and 7zip.

I need a file format which has these features:

-File name and encription
-Possible to add new files different than root directory

*7z does not support the second feature which I need: http://code.google.com/p/peazip/issues/detail?id=59

*Rar support all of them but rar compressions does not supporting by peazip or 7zip.

*Zip format supports the second feature but does not support the first.

For me, it is not important the level of compression. Does anybody know any archive format which I need?

Thank you!