Microsoft speech recognition 8.0 64 bit

how can i get MS Speech recog to work with LibreOffice?I am running windows 8 on a a 64 bit HP Touch

You probably can’t. Related questions dealing with MS Speech can be found here and here. There is currently no support for this product. The related enhancement request is fdo#69039. From comment #5 in that bug:

Microsoft Text Services Framework (TSF) is in “legacy” status. And currently no agreed “standard” exists for Speach recognition. Microsoft has gone its own way with UI and MSSR. And Nuance, with its current Dragon NS 12–Full Text Control function–looks to again have omitted Apache OpenOffice and TDF LibreOffice support for UNO API, and only supporting Microsoft productivity products.

In the not too distant future, a full implementation of a native IAccessible2 (v1.3) standard based bridge for Windows OS will provide the Assistive Technology (AT) hooks needed to implement Windows speech recognition to both Apache OpenOffice and LibreOffice.