I have Mitsumi4804TE and that driver rocks, because if I use wonder cds then I can burn normaly 120min.
But Mitsumi can burn much over than normal capasity but it depends on cd features. Some cd will burn witout problems to 90min (74min).
REMEMBER if you burn your cd over than what is normal capasity of the cd, your burner might be damaged, so what I try top say is don't try to overburn too much!
Personaly I don't use overburn if cd need bigger cd I go to out and buy wonder cd (90min or 120min)! Of course you can burn 74min up to 76min-80min!
Here is site where you can find wonder cd compatible burners "www.disc4u.net" <- if I don't remember wrong!
If you wanna try how much you can overburn, just try... but be careful!
Hope this helps!