I've built a content website, which is built like so:

It has categories - each category can have parent category,

and then there are the content items, which belong to a category

(content items can be articles,letter summaries, etc.).

I want to build a cms for this website.

Is it possible to integrate an existing cms solution like umbraco

for the website structure I described above ? or should I roll my own CMS ?

How do you add code-behind, custom menus, app_code classes, etc. in umbraco -

basically, my questionis how do you integrate umbraco into an existing website or vice-versa,

how do you integrate an existing website into umbraco ?

Thanks.