[Zope] Mixing of ZPT and DTML

Since I'm new to Zope, I've been able to jump at ZPT from the beginning without needing to "unlearn" DTML first... One thing nags me though: I use ZPT for my product classes web methods when while constructing an intranet. However it doesn't seem that I can use the same web methods inside ZMI, since ZMI still uses DTML and presents its tabs through the DTML variable "standard_header". What do people generally do when using ZPT? Do you create separate editforms/display files for both ZPT (for use in you own application) and DTML (for use in ZMI)? Or have I missed some vital point? - Carsten