I thought the Aopen 1232A/Pro did SD2, but I was very very wrong! I posted a similar message on cdrinfo.com and the expert said that the Aopen CDRWs did not support EFM encoding. Boy was I disappointed, since I couldn't exchange my burner after 7 days. But, if you can do it! I've heard that the Acer 1208 or higher can do SD2 perfectly, although it may have problems with cdr media, plus you can't turn off the seamless link feature. For more info check the CloneCD site (www.elby.de).