You can download the files from the members area over on vb.com. However, if you modified the files in anyway, like for a modification, you will have to reapply those edits.
If you have a full database backup, then look at these pages in the manual:
Backing Up The Database via SSH/Telnet or
Backing Up The Database via phpMyAdmin
Restoring The Database via SSH/Telnet or
Restoring The Database via phpMyAdmin
If you don't have shell access, some people have also reported success with these scripts:
MySQLDumper
MySQLHotxcopy
Bigdump