[quote=lanceomni;20877]How did you update to 10.5.6?

Open Terminal and type:
uname -a
Reply back with what it says your kernel is. It should look something like: 9.5.0 Darwin Kernel Version 9.5.0 Voodoo; Release 1.0 :xnu-1228.7.58/BUILD/obj/RELEASE_I386

In answer to your question, I used Apple software update to upgrade to Leopard 10.5.6 (but previously I had done the update included in Voodoo_Kernel_Release_1.0_Rev_A.dmg.)

I was not able to do what you suggested because I could no longer mount disk images but I realized from your question and from reading the docs that accompanied the voodoo image above that my problem was that Apple's software update installed a new kernel called mach_kernel but that was not the kernel in the com.apple.boot.plist (yeah I found it finally...as I said, I'm new to this). I renamed mach_kernel to mach_kernel.apple (just to remember where it came from), edited the plist and now "uname -a) says 9.5.6 and this is also the version of the system.kext. Now MS Office (Word, Excel, Powerpoint) and Filemaker quit unexpectedly when I try to load them) but so far so good for everything else. Since I need these to do some "real work", I'll go and do some more reading to solve this issue quickly. If you think you can help with this, I would appreciate it. Thanks.