Actually, there are only 2 essentially different versions which get actively developed - CHDK and SDM. (I refer to juciphox/allbest/trunk as CHDK).
While SDM is better suited for stereo photography, i'd strongly recommend you to use the normal CHDK - which you can get here: CHDK Download - build 0.5.1, revision #516
The CHDK versions you are referring to are slightly outdated.. most, or more like all of the features that made them special, are now included in the standard build. So, just download CHDK from the link above and be happy.
To your second request: You are referring to the EXIF data. See here: Exchangeable image file format - Wikipedia, the free encyclopedia
for some information about EXIF data. Nowadays almost every program for image organization supports reading out those values and/or store them, sort images by those values, etc..
But keep in mind: If you use the shutter/aperture/iso override of CHDK, the values in the EXIF data will most probably all be wrong.
Oh and btw.. you might want to read this FAQ - CHDK Wiki
and this CHDK for Dummies - CHDK Wiki