hi all, i have some problem regarding to my vray4Su batch render

nothing wrong with that, but its too fast for me.
what i mean by too fast is, normally I render in 3000x2000 pixel, its so large because i normally print out in A1 or A2 size paper. In my mind, better render larger then reduce it rather than render small then enlarge it that can resulting pixelated issue. in batch render, everytime vray finished the prepass, they directly jump to another scene, leaving no time to save the images (.png) eventhough autosave is turned on.

my question is, can i put some delay between rendering scene (not a scene delay)? so there will be a time for vray to save the image

i've tried with smaller resolution and it works well, directly saved (less than 1mb file), but 3000x2000 pixel is around 5mb here

or maybe u uys can suggest the recommended resolution

thx a lot...btw, i dont know my vray version, definitely not 1.48.89, it's sucks, crashing all the time