I'm not very familiar with htaccess, any help/advise appreciate :)

I'm uploading concrete to my other website right now into a directory. Let's say, /concrete/ . So the url (with htaccess enabled) would look like this

mysite/concrete/
mysite/concrete/page1
mysite/concrete/page2

Will it be possible to access those pages without /concrete/ using htaccess? These directories will need to be excluded tho.

mysite/wiki
mysite/forum