Sharing saves with different user accounts on the same PS3

There's a relevant thread here about it: http://forum.rpg.net/showthread.php?450516-PS3-question-Copying-save-files-between-users

Long-story-short: You can copy games between accounts (find the save file, press triangle to access the menu, copy, select destination account), but some games refuse to load saves that were not created by the currently-active account. You'll have to try it out to see.

There's a step-by-step guide to copying saves here: http://www.ehow.com/how_6818656_transfer-data-one-account-another.html