DVD+R for PS2

[vegitto]

Guys,

I have a problem like this:
After I fixed my Ricoh burner MP5125A (i meant upgrade the firmware), I can burn PS2 DVD games using my burner, but the new problem I got, it burns only for specific DVD media, so far I've tested using Laser brand (general purpose DVD) and sometime works, sometime the media need to be bent a bit. I use Nero burning ROM 5.5.9,
If I tried to use Verbatim, it burns sucessfully but doesnt wanna boot in PS2 (SCPH-39002), do you know why???

Do you know any other brand that could work??

So far: metal gear solid (need bent) & DOA2..