I am bored, so I will again fill you in.
ESR is actually 2 programs. You need both of them.
The PC tool, ESR disc patcher is used to patch a PS2 ISO file so that the resulting burned disc looks (to the PS2) like a DVD movie. You have to use it to patch every PS2 ISO you make before you burn it to a DVD.
The PS2 app ESR, is used to load a DVD game disc patched with the above tool.
It is ran from the PS2 "dash" like an application. You have to launch this app to play a game from the disc drive.
Nintendo Entertainment System - Region Free
1.1 Xbox - TSOP - 160GB - LG 8164 - HD/LAN/DVD led
1.0 Xbox - Slim - Xecuter 2.3b lite - 160GB - HD led
V7 PS2/FMCB1.7/2 Datel 16mb cards/Network Adapter