I wanted to have some nice custom blocks on my server, I have some on my .cw world I saved and I looked around the net how could I covert it into .lvl but I found nothing. Any ideas? (I'm using MCGalaxy for my server)

MCGalaxy has an /import command that can be used to import compatible world files into the server. It will attempt to also load the custom blocks as LevelBlocks
To use it, either place the file into the ./extra/import/ directory, or upload it somewhere you would have a direct URL to, and then use /import [filename or URL]