No, currently SPLTOOL does not work on non-*SCS spooled files. For conversion of AFPDS spooled files please see the AFPTOOL product.
Yes. SPLTOOL has a command named SPLTOOL PDF Configuration (SPLPDFCFG) that allows you to set up the attributes of the created PDF file. These attributes are based on the original spooled file's attributes. You can read more about this command and how it works in the online documentation