I am working on a answer file [autounattend.xml] I would like a piece of code

[Rbcc56]

I would a piece of to put into my autunattend.xml and unattend.xml to search through all drives except a,b and c.  This code will set a variable to %Drive and then run a batch file called apps,utils and batches then run z.cmd inside a folder on  app,utils and batches.  how is done?  Show in code!