IE 5.5 INBOX

My question is 2 fold:
1- I have over 10,000 read messages in my outlook express inbox!!! I need to save these.
How can I transfer the entire inbox contnts to another folder & also to a Zip disk???

2 – Then how do I delete most of the older e-mails?I do not want to delete all of the folder so select all & delete is not an option!So far I have only been able to select one at atime to transfer to another folder.

HELP from over flowing inbox!!