My problem & How this Solution Helped me:
My web-host seem to have restricted "importing .zip mysql dumps" to my server. And my Xampp which is an older version (XAMPP for Windows Version 1.7.1 !) don't seem to work well with Gzip. The newer version of Xampp does work well but since right now I am obliged to use PHP 5.2.x I haven't upgraded.
So, blabbing apart, here's the solutions:
Use this small but very powerful called Win-Gz tool to compress / decompress any file(s) into .gz (GZip) format. You can also use ArcConvert to make compression from .7z into .gz ... .gz into .7z etc...
Here are the download links:
Hope this helps .... have fun!