$chr(160) is fine for mIRC 7.x, but may display something other than a space in older versions of mIRC or some other IRC clients. It would be better to use another method to obtain spacing. spaces.dll works very well. There's also the method of using ctrl codes between the spaces. Either of those options will display correctly no matter what version or client others are using.
You're right, Riamus2. I suppose there'll always people who like to "stick with the past." Now, I know they have their reasons, but keeping anything or everything up-to-date is my preferred belief.