I don’t have access to this kind of parameters on SourceForge, but they already increased the size limit of attached files in the past. If you want to make your plug-in smaller, you could compile your class files without debug information (Enkonyito already zip them). His plug-ins are large because they include YafaRay DLLs.
Enkonyito, if you don’t find a solution on SourceForge, send it to me, I’ll host your plug-in on sweethome3d.com server.