Ok.  That design sucks.

Here's what I'd do:  Like MrW said, separate the inner joint.  It looks like you might be able to remove the large clamp on the inner CV boot, and pull the axle out of the inner part of the cv joint.  It'll be greasy and messy, but it might come apart.  You'll have to clean out the old grease, and separate the new shaft the same way.  You *should* be able to put some new CV grease in the boot and the inner part of the joint and then stick it back together.  You'll have to put a new clamp on the inner boot, but you should be able to get one from NAPA or the like...

Hope that might work!
Ryan