You can find an open source printer driver for both by going here and looking up each printer
Printer Database, then read the notes and download the driver and install it.
It looks like you also need to download the
Samsung Drivers package(which doesn't include the drivers for your printer), because it has other things in it which the drivers depend on to work properly.
Do that, follow the directions and with any luck you should be able to use those two printers. Printer drivers are not executable code, they're just ASCII text commands, so they aren't PPC or Intel-specific.
Hope this helps,
Mulder