The docs are correct, you need anything equal to or higher than 12.2(8)T (note the T). If you're using 12.2(19) then this is mainline code, not T train, and doesn't have the VPN client support.
Make sure you grab anything in the T train (with a T on the end of the version number), or anything in 12.3 mainline (12.3(1), 12.3(2), etc). The feature set needs to be IPSec DES/3DES, you don't need the firewall feature set but it won't hurt either.