Try looking
here , as well as any affiliate sites posted at that page. Some of those sites can be found
here you can find them under the section titled:
Scripts and scripting information for mIRC You could also enable your built in flood protection in your script
File>Options>IRC>Flood there are alot of options for you on this matter. If you decide to get a bot or make a mIRC bot that specializes in channel protection that is a good idea as well. Hope this is useful