Hey! I'v got it!
Well, more or less...
I've arranged to burn a Video-DVD with VIDEO_TS and AUDIO_TS folders "dragged and dropped" into my Desktop, and it works!
I've changed de target media from DVD+R to DVD-R and... I've setted options this way:
Window: Burn Compilation
Tab: General
On the fly: ON
Verify disk: ON
Write Speed: Maximum
Write Method: SAO ??? (I'm not sure to remember it well)
Copies:1
Eject the disc after writing: OFF??? (I'm not sure to remember it well)
Simulation: ON first time (with an DVD+R was not possible to set it ON), OFF last time (when I've been able to burn correctly Video-DVD)
Buffer underrun protection: ON
Pad data tracks: ON
Close the disc after writing: ON
Tab: Advanced (First four boxes are OFF, next 3 are not modificable, but first it's ON, and two last are OFF)
So it appears there is something wrong with my burner and DVD+R media for self-made Video-DVDs. May be InfraRecord was not involved in that problem, or may be it was, I don't know.
With an DVD+R and the same settings InfraRecord first "Writes file data". It says at device "HL-DT-ST DVD-RAM GH22NS30 1.01" but in fact there are nothing writed on media (in fact burner seems NOT to work at this stage).
At 100% Status change to "Preparing to perform the selected operation", appears a warning message: Some drives don't like closing in simulation mode (???

, who wants "simulation mode"? Anybody has selected simulation mode ON? me not, sure). And next... InfraRecord hangs and I must to kill it with task manager, no other way possible.
I FEEL this is a good program, but I'm not able to understand it. So many test and "trys" and... very HARD to me to burn with success.
Any comments or suggestion? (not "RTFM" please) EDIT: by the way:
http://forums.infrarecorder.org/viewtopic.php?f=6&t=1288#p1860r0b