Wouldn't you want to change
//iRite Images upload settings
$WAGLOBAL_Images_Folder = "cms_images/"; //relative path to your images folder.
to this
//iRite Images upload settings
$WAGLOBAL_Images_Folder = "../cms/cms_images/"; //relative path to your images folder.
I tried multiple formats and I do know that it may vary based on the server, but the latter option worked for me.
[oops! just finished reading your post above; odd isn't it. Have you only tried "/cms/cms_images/" (which didn't work for me) or also "../cms/cms_images/"?]
When the code is fine tuned and working properly (as on mine), I can use both features - browse server and upload photo - and they work perfectly: proper urls, photo appears, no hassle for the client at all.