How to fix kernel panic on MacBook Pro?

i have a macbook pro that i bought in sept two years ago...15" that was running 10.4.11 i believe? i decided i needed to install windows for some things, so i installed leopard just fine, put in the partition and then when i went to install windows a friend said i need to wipe my whole computer first and just start over when doing this. we hooked his macbook up to mine, and we wiped my whole computer using target disk mode and tried to install leopard through the host computer's optical drive.

we got a kernel panic- restart...

we've reset the PRAM, tried removing the battery & holding power for 10 seconds, made a GUID Partition, booted from install discs, tried to run the apple hardware test (it just flashes a folder with a question mark in response),....

finally trying something, we received text behind the kernel error, which read:
"0 [Level 3] [ReadUID 0] [Facility com.aple.system.fs] [ErrType IO] [ErrNo 5] [10Type Road] [PBUkNum 4766994] [LBUkNum 0] [FSLogMsgID XXXXXXXXX [FSLogMsgOrder First] 0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [FSLogMsgID XXXXXXXXX [FSLogMsgOrder Last]"

im hoping its not hardware. can a hardware problem just pop up like this, caused by a reinstall? the computer really worked totally fine before this- no problems aside from the dvd drive breaking early on (every mac laptop ive had loses them so i dont care so much anymore- i have an external)...

now when we turn on the computer not attempting to install, we just get the flashing question mark folder, which makes sense as that indicates that its trying to find an OS, and it doesnt have one....

does anyone have any ideas? we have an appt at the mac store tomorrow but im not sure how much theyll help us considering my lack of applecare.

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