Rebrand: Someone suggested using a generic MAIN + Roger's FS + Roger's custom. MAIN and FS should(must?) be the same CDA. Then use SEUS to update whatever MAIN/FS you have used to the latest Roger's version. You are successful if you can use SEUS to update, otherwise, your choice of MAIN and FS combo are probly no good.
Debrand: Avoid using A2uploader to upload MAIN and FS if you can, see this post and it's follow ups. Use CDA 1201-0095. (I can't edit that post. Otherwise I'd change the CDA's there.)
(The moderators here have a tendency to edit your posts often, like my link above was pointing to a different post which contains more detailed instructions particular to your case and the W760a. I'm not gonna change the link back, nor want to create a scene. If you still want to see my original link, just search for my posts.)
xyn19