[kosmiq]

First off: Create the thread in the correct forum (like the xbox one :P).

Secondly here are the answers:
There is no working PS2 emulator for the xbox (and only one very bad working for PC).
PS1 games can be played on the xbox but to do that you need to have PS1 games, create an iso of them and transfer to the xbox.

About getting roms... Well you could download them if you legally own the game. Like playing N64 emu on the xbox make sure you own the N64 games legally or you will commit an illegal action.

Softmod: gives the same possibilites as modchip but is not considered to be as safe as modchip. If your dashboard gets updated when you use a softmod it will be trashed and a reinstall will be needed. On the other hand there are some update safe softmod nowadays. Still a modchip is better in terms of recovery options and so on.