No, Pescado says that if they show up as hacks (red in S2PCI) and have no name they should be deleted on sight. If they aren't red they could be almost anything, clothes, eyes, skintone, etc. Stormy, I already replied to your post at VS, but I'll say it again here.
short answer is maybe and yes
Those files with an alphanumeric code are files that have been imported with lots, the only way to find out what they are and if you want to delete them is by looking at the file with something like SimPE or S2PCI.
And yes, you can put all bodyshop downloads in the saved sims folder, that's where all mine are, as long as they aren't in a sub folder of the saved sims folder.