Find it odd that those games detect as a PS2DVD they should detect as DVD Video
What guide did you use for Time Splitters
Converting CD to DVD does not always work one way there are several methods that can be used
Time given I will test those two myself though
ESR has 2 main versions the normal version that has 2 or 3 elf files that operate slightly different and boot a game directly and a version that opens a menu before booting a DVD with a few boot options
ESR beta r9b & ESR GUI that is based on ESR beta r9b
More info found at http://psx-scene.com/forums/f164/esr-public-beta-58441/
As far as I know ESR has not been worked on in some time
My tests will have to wait a while I only have one DVD burner and that is on my laptop that I am currently trying to fix, My PC that I use most the time does not have a DVD drive, just the internal HDD and a bunch of USB HDD's