Hi,
1- Depending the context it requires custom code ; but it's something "possible".
2- I do not understand your question
3- Without any context, I'm afraid that I can't understand either.
4- Yes, that's more than recommended.
Please note that 2.2.2 is an old version and we release HikaShop 2.6.0 few weeks ago.
That new release propose a new interface to configure the menu and modules, directly integrated in Joomla and easier to manage (not "associated modules" anymore).
So I recommend you to update to that new version ; it will be easier for your HikaShop configuration and menu creation.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.