Relative Paths & Images

After struggling with images and relative paths for a day, I got it to work in IE but not in FireFox. I find many helpful suggestions on this forum, but not one which seems to solve everything. I’m using the latest .net version (2.2) of the FCK editor. It seems that whatever combination of BaseHref & UserFilesPath won’t work for both image browsing and image display. If I use C:/AppFolder for BaseHref and ~/UserFiles/Image for UserFiles Path, the image browser works, but the image doesn’t display. If I use C:/AppFolder for BaseHref and UserFiles/Image for UserFiles Path, the image will display, but the image browser won’t work. I added the following code in the “FCKeditor\editor\filemanager\browser\default\frmresourceslist.html “ file (in the GetFoldersAndFilesCallBack function):

// Replace only the first 'slash' and the first tilde
var slash = '/';
sCurrentFolderUrl = sCurrentFolderUrl.replace(slash,'');
sCurrentFolderUrl = sCurrentFolderUrl.replace(/~/,'');

…which seems to solve the problem (if I use C:/AppFolder for BaseHref and ~/UserFiles/Image for UserFiles Path), but it doesn’t work for FireFox. Any hints?