Step One:
Check your cdr's and see if they are supported by Microstudio, here is the link to supported burners:
http://www.mtu.com/support/cdr-ide-drives.htm
If your burners are supported, and I did not see them on the list, the next step is to go to the ASPI drivers post and follow the directions for installing the MTU drivers you will need. Here is the link to the drivers:
http://forum.mtu.com/showthread.php?s=&threadid=1161
Jim