The TRD format itself isn't supported, but you surely don't have to load all the individuals XML defs every time.
TrIDEngine provide functions to load single *.trid.xml definitions, one by one, and to get/set the object that represent them all at once.
So it's possible to package them in any kind of container you may choose.
Here's a very simple example from TrIDEngine's How-to, using serialization.
A possible way to save the definitions:
MyDefBlock = Ctype(PE.GetDefs, System.Collections.ArrayList)
Dim saveFile As FileStream
saveFile = File.OpenWrite(sBasePath & sDefPackageName)
Dim formatter As BinaryFormatter = New BinaryFormatter()
formatter.Serialize(saveFile, MyDefBlock)
saveFile.Close()
Then, for reloading them:
Dim readFile As FileStream
readFile = File.OpenRead(sBasePath & sDefPackageName)
Dim Formatter As BinaryFormatter = New BinaryFormatter()
MyDefBlock = CType(Formatter.Deserialize(readFile), System.Collections.ArrayList)
readFile.Close()
PE.SetDefs(MyDefBlock)
Hope this helps,
Bye!