Missing Juno email messages Windows98SE

Last week my wife opened an email and her computer started acting strange so she did a hard shut down. After rebooting she could not access the internet, open Juno, or any other programs. After reinstalling her network card driver, I was able to connect to the internet, and her Juno ver.6 program would open, but her inbox, sent messages, and address book entries were missing. I ran Symantec anti-virus software and discovered that her computer was infected with Trojan Horse and Trogan.ByteVerify. I quarantined the infected files. I also had to reinstall her HP printer driver.
Everything is working okay now, but I would like to fix the email message problem. Upon further investigation, I found that all of her email messages, and address book were scattered throughout the IE5 temporary internet files.
Is there anyway to restore these email messages I found in the temprary internet folder(both in and sent) back to her Juno mailbox.bdb file?

Thanks,

Dave