[U-Boot] Bad Linux ARM zImage magic

[claus anders]

Due to this patch:
0001-omap3_beagle-uEnv.txt-bootz-n-fixes.patch, u-boot for my beagleboard seems
to need always a zImage. Up to now, I used uImage just fine.
Questions:
-          Can I convert vmLinux or uImage in to the
required zImage?
-          Is it possible to use bitbake (I’m using the
Angstrom 3.28 kernel) to create a zImage instead of uImage?
-          Can I just replace the part
"loaduimagefat=fatload mmc
${mmcdev}:${mmcpart} ${loadaddr} zImage\0"
With 
"loaduimagefat=fatload mmc
${mmcdev}:${mmcpart} ${loadaddr} uImage\0"
 
In omap3_beagle.h to get the previously working behaviour?