Problems burings CD-R - 8x

[Sir Magilla]

Thank you for your answers.
Inthe meanwhile, I burnt other games and I noticed that with the same Philips CD-R 90 I havent'got any problems burning 8x if the images are under 800MB. I had problems only with Wipeout Fusion (802 MB) and Tenchu3 (806MB), which don't work on my ps2. So I think it's a problem of images over 800MB, that my PS2 cannot read, even if the capacity (it is what CloneCd says) of Philips CD's is 807 MB (so it shouldn't be overburning if the image is under 807MB).
I tried to search for 800MB Verbatims but I cannot find them... do they exist?
I was thinking about buying a 100min/870MB cd... do you think PS2 can read it?