Two things (well three if you count "Please use code tags"):
Firstly, I did something similar not too long ago on a Windows network as well...just mount the drive, so that you can easily access the drive as if it were local (I used File::Copy fine this way).

Secondly, AFAIK, Perl doesn't offer a portable way to get the file creation time. One (messy) way to get around this is through a system call to DOS. dir /TC FILENAME will show the creation time of a file. not pretty or clean, but it will work (you'll have to do a bit of parsing).

Archive::Zip should do exactly what you want, I believe. It's already installed on your system too, most likely (standard with ActiveState Perl)