So I just want to leave this here, so other people may read it if they ever happened to have the same issue. So yesterday I was installing Crt_Emudriver 2.0 with Windows 7 on a Amd Radeon 5450, using the vga input of a lcd tv. After the driver was finished, and crt_emudriver requested a pc reboot, I actually got a "unsupported signal" message on my lcd. I tried with another lcd monitor and had the same message. I then tried to connect on my Sony Trinitron tv, which I was actually going to use for Groovymame, and had a fuzzy/unstable image (I know, that was really stupid, I could have fried my tube). The solution was to use the Hdmi output of the gpu and plug it on the lcd so I could enable the EDID emulation, and then connect to the crt tv. Right now is running great, only thing I've noticed is that usually the correction of the geometry issues of one system causes geometry issues on another system with different resolutions, but nothing really to whine about. So this is only a report, for those that get the unsupported signal message before the edid emulation, DO NOT plug on your crt tube, as I believe you can damage it for good, use the hdmi port instead.
Cheers.