sneakysnake. are you sure you are completely sure what you are talking about?
The 40GB, 80GB re-release, 160GB, and the slim version of the PS3 are not backwards compatible with PS2 games because all hardware chips from the former console are omitted and there is no software emulation. However, all versions of the PS3 are able to play PS1 games.
and there you have it. the final answer.
do some F**KING research yourself: P