overburning

Anyone knows how much data can be burned by overburning a 4.7 gb(weel only around 4500MB)? Does it cause any problem on the burner or wont it be read on all drives. Does overburning capability varies with brands??? Which is best for overburning? +R or -R ? Ive have some DVD9 movies with me...

Hi! I am using samsung CD-r/RW SW-252F I want to konw that my writer is support CD overburning or not. Plz help me.

how to write 4.7 gb data on a dvd :?: :?: :?: i have a sony dru 720A writter and the dvd mentions 4.7 gb 4X while writting it shows 4482 mb capacity tried overburning it sets the parameter to max 4600 mb guys plz help