Thanks man, I'm glad you posted this here because I have been wanting and trying now to install Rockbox on my E270R and was concerned that the modified bootloader would mess things up DRM or subscription wise, Thanks! Did you use Windows or Linux?? I'm havin troubles doing a Windows install, gonna try Ubuntu now.
By the way, if they have your credit card info, they will auto-bill you every month or quarterly even. I have it and it comes out of my checking every month automatically. Just thought you might check that, unless you have it free somehow else still.