Sites in a parallel structure

Hi!
I am quite new to the multisite feature of WordPress but so far everything worked as it should. My problem now addresses the linking:

I have installed wordpress in
mydomain.com/wordpress
and would now like to have my blogs available at
mydomain.com/blog0
mydomain.com/blog1
mydomain.com/blog2
and so on. The basic idea behind: use wordpress for multiple blogs with my own main site which is not running wordpress and without having to add wordpress/... for every blog.

Since there wasn’t much to find on the web about this (actually there was something and it even comes from this forum – but I cannot really believe it, I hope you don’t prove me wrong…) I would like to ask you. I thought that with some clever use of mod_rewrite I could link directly form mydomain.com to the wordpress folder once blogX is called. In wordpress itself I would adapt the site url for every blog.
An other possible approach but by using subdomains is shown here but since its on subdomains the problem is slightly different.

What do you think? Possible and if yes, could my idea of going over mod_rewrite be a solution (so far I couldn’t make it work).
Thank you very much for your help in advance and sorry if I ask the question of the topic linked above again, I just think the settings may have changed 🙂
Best, sobunt