Your post is a little vague. I'm left wondering what exactly are you trying to accomplish, and why are you doing it from a CGI script?

When asking questions about programming, be prepared to learn something. Sometimes the best answer to a question like your number two is "learn fork()".

LWP::Parallel may help you. You'll need to be familiar with the use of LWP, for sending cookies, form POSTs and the like.