Ms Outlook personal folders backup

Just locate the .pst file, and backup somewhere safe, like a cd. With Outlook 2003 to open a .pst file you only have to do file, open, outlook data file, and then select the .pst you wont to use. Hope this helps.

Like in the previous answer just copy the *.pst file/s to other location/support but do a save of personal settings also (use MS Office wizard to save personal settings on the same location).
In case of corruption or if you want to migrate personal settings/files to other PC, just run the restore personal settings wizard and put the saved *.pst files in the same place/folder.