Personally, I'd prefer to avoid anything that relies on the XP/2K3 built-in burning engine. It needs to work on Win2K too. I think the best thing is that everything is regulated from HFANSWER.INI and that HFSLIP assumes no defaults. These would be the variables: NOBURNISO= BURNISOCMD= The BURNISOCMD variable should contain the command to execute the ISO burning. If this is not set or if it is empty, no burning will take place. If you want to bypass ISO burning even when you added the BURNISOCMD command, set NOBURNISO to 1. What do you think of this?