Installing Rockbox on a Sansa Clip+ with firmware 1.02.18A

[NaokiKashima]

Hi there, I have a Sansa Clip+ which has firmware 1.02.18A on it.  I'd like to use Rockbox, but the installer is asking for an original firmware file, and my understanding of this is that it is requesting the current firmware that it actually has.  I've searched the forums and a few places and it sounds like 1.02.18 is incompatible with Rockbox, but the threads I found were confusing and I have no idea how to go about dealing with this issue.  Am I just screwed as for installing Rockbox?  If not, how can I go about installing it on my Clip+?  Thanks!

[saratoga]

You just have to provide a firmware file, doesn't matter which so long as the installer knows how to patch it.

Edit:  Just noticed the installer was updated a few days ago, so it should support all known sandisk firmware versions.