[Zope] Programatically adding folders

Hi, I'm wondering what the correct way to create a folder within a folder in a DTML method is. I tried: <dtml-call "folderObject.manage_addFolder(folderNameVar)"> But wasn't convinced by the results. If you use the form in the management interface, the eventual method that gets called is: folderObject/manage_addProduct/OFSP/manage_addFolder Which would suggest I should use something like: <dtml-with "folderObject.manage_addProduct('OFSP')"> <dtml-call "manage_addFolder(folderNameVar)"> </dtml-with> But I haven't been brave enough to try it. What IS the correct way? More importantly, where are/should things like this be documented? Also, how should I find out what the 'preferred' way of doing something is? cheers, Chris