nextgen gallery

hi!
anyone knows how i can add more pics than one from the nextgen gallery that i uploaded before with a zip-file, into my blog article.
otherwise i have to put in pic by pic into my blog…
anyone knows why i cannt use the wysiwyg function in editing a blog. i can only choose the grafik-editor not the html editor.
thy for your help. can i also write a text beside a picture in the blog?
my url ist https://lebenwasgeht.at/
cya bernhard