backup ps2 games on cd-r

[weezee]

Hi guys, I've read the stickies, but they're missing one type: how to copy a small DVD to a CD.
I'm trying to copy Ninja Assault from DVD to CD. The game is about 670 Mb, so it perfectly fits on a CD, but I can't make it boot.
I have a PS2 PAL v7000 with DMS3. The game is PAL and works from both DVD and DVD-R. The CD brands I've tried are Verbatim, TDK and Fuji, all burned at 8x with a Pioneer 105.
All the backups I've made on DVD-R run flawlassly. This one won't boot. It hangs after the PS2 logo.
I've tried direct copy with RecordNow MAX, Alcohol, CDRWin and Nero. Some of these simply refuse to copy a DVD to a CD-R, others do copy it, but it does not work.

So I've tried both KitBuilder2 and CDGenPS2, setting the LBA of system.cnf at 12231, with and without dummy, but the game won't run anyway, same hanging after PS2 logo. I've made tens of Dreamcast selboots, so I'm not a total newbye with this kind of tools, but it seems I'm ignoring some important information..

What am I doing wrong?