Weld Lisp or add-on...?

Hi All,
Is there a good free weld lisp or a add-on available that:
With dialog box - is fully customizable for settings, such as colours,
layers, text size or style, etc.
Shows a preview of the weld has it is being built (eg. with tail, all round,
site flag, etc)
Covers all standard welds either ANSI and/or ISO weld symbols
Can be used with metric values for weld sizes
Can work in either AutoCAD 2004 and/or 2002 on Windows XP
Any help on this would be much appreciated.
TIA
DP