O.K guys - no probs - but I expect you all knew that.
I installed the drives & so got rid of the IDE adapter, ribbons and modular power cables. This alone freed up a PCI slot & cleaned up the interior.
The MB SATA connectors are banked as 1,2,3,4 and separately 5,6. I left the HDD's on SATA 1 & 2, & decided to put DVDs on 5 & 6, to keep 'em separate from the HDD ones.
For some reason, although both DVDs showed up in BIOS, the Samsung wasn't recognised by the system. I connected them to SATA 4 & 5 & now all is o.k.
Am a bit disappointed by the spinning noise from the Samsung unit, when it was supposed to be quieter than most.
Now, I just gotta remember how to set up an internal modem for dial-up connection !? Due to losing an expansion slot, I had to change the modem to a different fitting. I don't suppose for one minute, that my old setting will just jump up & be recognised,,,,,, of well, I can dream.
Hope this helps others in a similar quandary.