Converting to flash memory

Really hoping I can get an answer to this!! I tried to upgrade the memory to flash via a zif-cf adapter and a cf-sd card adapter from the standard hdd. Prior to this, the iPod was working fine aside from it taking some time to start it up (aka very low battery) when charging, but for the most part was behaving. After swapping out the items I get an error where the iPod is stuck in a boot loop. *sigh*. What it is doing when I plug it into the computer or wall it is saying very low battery please wait for it to charge and then in a couple of minutes, the sad face with the apple support url shows up, but it wont connect to the computer. It shuts off and restarts to the screen where it says very low battery. So I tried to put the old hdd back in and the same thing is happening. I just replaced the battery and there is no change to it. I am stumped.

Please help!! :(

P.S. I've replaced everything in there aside from the screen, click wheel, and case.