You may ignore the first part of my post, between the dashes. Start reading from EDIT:
-----------------------------------------------------------------------------------
This is the one I have, I don't know about running it on the 6000.
To unpack it you need to extract "opera-multimodal_arm" from this IPK
Then rename it "opera-multimodal_arm.tgz"
Open that, and then open /data.tar.gz
Then in the /home/zaurus/.opera/ directory, you'll find "opera_arm.ipk"
It's been a long time since I used it on my C3100, but I think "opera_arm.ipk" is the 7.55 version.
There is a lot of other stuff in this package also.
-----------------------------------------------------------------------------------
EDIT:
Here's an interesting tidbit.
I found this html document inside this package. According to this README, you just install this entire package onto a 6000.
I think the above directions about extracting the contents were used for getting this to work on the clamshell series Zaurus.
I'll attach the html doc here also. The attached html doc also requires "man.gif" and "file.gif" to be complete.
(man.gif is first image, file.gif is second image)
WebSphere® Everyplace® Multimodal Browser for the Sharp® Zaurus SL-5600/6000 PDA README