I have another laymans question. What is the syntax for "less then or equal to" in XML? In the SDK it says <= but that is not right and in the XMLGAU01.rtf that you wrote it is <=;, this does not appear to work either. When I open this with XMLPad it gives me a:A semi colon character was expected. ((A:GENERAL ENG PROPELLER LEVER POSITION:4, part) 0 ;) ((A:GENERAL ENG PROPELLER LEVER POSITION:2, part) 1 >=;) ||Right after the "lt"If this has been covered elsewhere here I am sorry, I looked but could not find any reference.ThanksMitch

A typo, sorry.It is "<=" I think.NOTE all "<" ">" for less or more have to be written with ampersand and semicolon, since the original "<" an ">" are XML format characters. So NO semicolon after the equal sign. "&" is "&".I haven't checked the code, actually, maybe later.Arne Bartels

Thanks for the come back. I worked around what I was trying to do, but I have a couple other cases where I would want to use it. While I am thinking about it, is there an "A" variable for the vacuum or suction on each engine? Also I thought I read some where that it is possible to change the values in the aircraft.cfg via XML. Is this so?Thanks againMitch