Thank you for many replies and great interest to this topic, but I would like to repeat my original question: Can I use without problems Synaptic for this installation.
Reason: I would like NOT to use terminal commands if possible with Skype installation.
Background: I have made last week installation with terminal commands by using the instructions / command shown above in answer ''Step 1, Step2, Step 3 ..'', but I made some mysterious misstake(s) and I greated somehow a ''SystemEror level problem'' (= in /etc/.. line 54 was lost for some reason ... -> SystemError warning)
Result: I did not find any way / method / command to sort it out, than to REINSTALL the whole Ubuntu 14.04 LTS (Finish remix) once again -> then upgrade it to Ubuntu 14.10.. and, as you understand, it is not so nice excersice to repeat ....)
Conclusion: So, Synaptic may be a safe solution, if Skype 4.3. works OK in Ubuntu 14.10. with this skype 4.3.0.37-OubuntuO12.04.1 packet version. This packet version at present Synaptic offers me for installation.
Start by opening the Software & Updates application, and tabbing to "Other Software".
Enable the "Canonical Partners" check boxes. Close the application. It will give you a message about packages being out of date. Select "Reload".
Open synaptic and search for skype after the reload is finished.
Mark for installation, and apply changes.