Magento 1.9 Multi Store with Multi Website

[Zombie65]

I am about at my end!
I have followed many tutorials on how to get this done.
I have a current website, I need another website on a different domain that shares the same database as website #1.
Always end up with the same error:

/app/mage.php cannot be found.
What am I doing wrong?
I've read that there should be no instance of magento installed on the second domain.
I insert a .htaccess file and an index.php file.
After making the changes on the tuturial....
Error message

Can anyone give me a hand on how to get this corrected?

[MagenX]

all you need to do just go to magento admin and create another website:

https://docs.magento.com/m1/ce/user_guide/store-operations/stores-multiple.html

then just add this website code into .htaccess:

https://stackoverflow.com/questions/8754089/magento-site-switching-htaccess

[Zombie65]

Couple of questions....
I have seen many tutorials on doing this.
I'm a bit confused. So please bare with me but I need some clarification.

I have 2 domain names. Should there be a subfolder in my main directory for this 2nd domain?
If so, I would copy the htaccess and index files in that folder and then modify them?
Or, just modify the main site htaccess and index files?

[MagenX]

no need any folders or copy files...

just add new website in magento admin, select new webstire scope and configure base url,

then add website code to root .htaccess file

[Zombie65]

SetEnvIf Host thunderkissnw.com MAGE_RUN_CODE=base
SetEnvIf Host thunderkissnw.com MAGE_RUN_TYPE=store

SetEnvIf Host tknwthunderdome.com MAGE_RUN_CODE=thunderdome
SetEnvIf Host tknwthunderdome.com MAGE_RUN_TYPE=website

This is what I have in my htaccess file in the root.

Still errors out with

home/thunderk/public_html/tknwthunderdome.com/app/Mage.php was not found

[Zombie65]

Found that there was a sub folder in the root directory for the second website. 

Deleted that and the Mage error went away.
Issue is now that when I try to access the second site, it still directs me to my  main site

[ApsG]

Did you manage to fix this ? Find a solution ?