[Koha] Equals sign in a macro?

I would like to create a Macro that enters the base of a URL. However, I find that I cannot execute the macro due to errors caused by the use of an equals sign. Curly braces also seem to cause a problem. I played around trying to see if I could escape the problem characters, but didn't get anywhere. I also tried substituting in "=" and "=" , which I think are HTML codes for "=", just in case, but both seem to be ignored and don't make it into the 856 that is created. Anyone know of a way around this? Thanks! Tasha Bales Enterprise Services http://isesi.web.boeing.com/