I heard that DS Lite can't dump games, I'm not sure, just look around, there is a dumping program for the DS however. You'll be better off downloading the ROM$ sinse you legally own them, but then again, you may want to dump them.
You can get the saves, with an NDS tool called "Rain" the latest release is r15... or r16... I'm not sure, I just got my M3 Lite today (upgraded from M3 CF)
But yeah, search around for those, and good luck.
ultrablade