[Tutor] string.replace() question

[Shawhan, Doug (EM, ITS)]

I have a need to replace charachters *after* a certain point in a string:

To wit:

"c:\\tmp\\howdy\joe\howdy\moe"
becomes
"c:\\tmp\\howdy\\joe\\howdy\\moe"

is it possible somehow to use bitwise operations in string.replace()?

Something along the lines of:
addrbook=string.replace(addrbook,"\\","\\\\",[skip first two instances])

Thanks!

d