E-book refering to mcad files NOT in installation directory?

To all

I created an e-book following explanation in manual and it works fine. I am looking for a way of having the folder where I store all the mcad files of interest not in the MathCAD installtion directory (...\MathCAD/MathcAD 14/Handbook/  ) but in a totally different folder. I cannto find anything in the manual about that. (Probably not reading properly I guess!).

Thanks

Regards

JXB