ok, thanks. The binarys are confusing though   Oh well, Im sure I'll figure it out.
 Oh well, Im sure I'll figure it out.
The source files are confusing.  The binaries are set to go.
Assuming MAME 0.79 is installed in C:\MAME and you know the new games and have the new ROMS, (and know command prompt usage), it's this simple:
Create new folder C:\MAME083\
Download MAME 083 binary and extract to C:\MAME083\
Put new ROMS in C:\MAME083\ROMS
At command prompt, type
cd\
cd mame083
mame -cc
Open C:\MAME083\mame.ini and edit file pointers to point to C:\MAME\ whatever, match other settings to C:\MAME\mame.ini.
Setup your frontend and play new games.