Creating my own plug-in repository

Hi

I'm a newbie in eclipse world and have a question about the eclipse plugins repository.

I would like to get all the plug-ins that I use and create a plug-in repository so it would be accessible from my eclipse (just like when I add plug-ins via Help--> Install New Software). My PC is running in the LAN and I don't have an internet access of any kind, so I can't just install them in a regular way.
Of course there is always an option of manual downloading and installing, but an automatic approach sounds much more elegant to me...

I couldn't find any tutorial about that, so any help will be greatly appreciated.

Thanks in advance,
Mark