Map projected CTX images ?, How to merge/overlay CTX with map projected HiRISE Options

[Nirgal]

Does anyone know if/where there are map projected CTX images avilable ?

There are the EDR (i.e. raw) data sets as IMGs at PDS, but so far there seem no RDRs (i.e. calibrated and map projected) versions of the CTX images publicly available (yet?)

However, when I'm looking at the tight CTX image integration in Google Mars it seems that they have the exact footprint data of all CTX images readily to be overlayed with the global Mars/MOLA/HRSC map ...

So somehow the map projection of CTX images/footprints must have been done at least for Google Mars.

Ross Beyer even has a link on his web page to the footprint data of all CTX images as KML files:
http://pirlwww.lpl.arizona.edu/~rbeyer/kml/CTX_PDS.kml

So I'm courious, if the complete map projected CTX image data exists somewhere or if it is required to do the projection for each image oneself with the usual ISIS tool chain only ?

Background: what I really want to do is to merge/overlay map projected HiRISE images with their corresponding CTX observation as a kind of "background"-layer ... Ideally this should be performed with pixel-precision which, of course, requires exact map projection from one
camera's space to the other.

Probably this must have been done before, but I couldn't find enough information on this in the ISIS doc & ISIS/GIS community forums.

Thanks in advance for any help !

Bernhard