Help with special .htaccess rewrite

I need an expert in rewrite for .htaccess. You need to be really good at regular expressions and I need this to be done today/complete. Note: [login to view URL] is just an example and not real, but the structure is the same. Solution must be presented in a .htaccess file and not in apache-config. I have this in my plain .htaccess-file: RewriteRule ^(.+)$ [login to view URL]$1 [QSA,L] This redirects all requests like this in a hidden way (browser keeps [login to view URL]): [login to view URL] -> [login to view URL] Works perfectly - browser keeps [login to view URL] in address-URL-bar, but secretly shows the content of the [login to view URL] website. No problem. THE PROBLEM / TASK: I now want to use WordPress on [login to view URL], and stil keep the functionality above, having a short URL to my image-service on secure.website.com. As you know, WordPress also uses this .htaccess file and that creates a conflict. After installing WordPress, it would only give me a "page-not-found" error since the handling is done by WordPress. As soon as someone has enters [login to view URL] with a hash similar to this: 475b41ff5f, then a website with info from [login to view URL] should be shown. If the user is entering [login to view URL] or similar page, then normal page in WordPress should be used. So you need to somehow check for the first / in URL and determine if the user is requesting a WordPress-site OR our clipboard service. We can not change the [login to view URL] hash in any way. You option would be to look at number of characters in that hash(10) or if [login to view URL] returns a website. https://website.com= public website promoting a copy-screenshot-to-our-cloud service. https://secure.website.com= private area for administration of clipboard-clips (images)