@andy11493: cd means "change directory" - it's a command. You type "cd" and then the folder name to browse through folders. You can type "cd Desktop" and then "cd Minecraft Level Zipper" to go to a "Minecraft Level Zipper" folder, or I think you can just put the full directory as Atomic did in his example (starting with c:\).
I'm using Windows Vista Home Basic. I tried the first one you uploaded and I tried it with the new mcc.bat you last posted. I dragged and dropped the level file onto mcc.bat and it just gave me a screen for a split second like with other people.
Then I did the cmd method. I literally typed "mcc.bat mapname" the first time. In case anyone else was confused, you're supposed to put your level file's name where Atomic's instructions say "mapname".
I typed it right the next time and it worked just fine.
My map was named level and I renamed the DAT file to server_level.dat
I tested it in multiplayer. I connected to the server, then the game crashed immediately. I was having the same problem when I did the gzipping myself, so I was hoping your program would do the trick... I guess I must have had some wrong settings in the level generator. I'll try some other settings in that, I guess... By the way, what's a "seed"? As far as computing goes, I only know "seeds" for their relation to torrents.
This was my error when I tried to play the game, by the way:
The game broke! [java.lang.NullPointerException]
A seed is a number used to generate other "random" numbers. Use the same seed and the same order of numbers come up.