What exactly is locking up? Is the computer locking up when running DSL from the CD or something else?
What is the exact error you get related to the hard drive? Is it the only hard drive in the emachines computer? Was it the only hard drive while you installed DSL on the other machine? GRUB may be having specific issues depending on what it thinks the number of drives was at install time.
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Has it been a few days since I replied to your thread?
Don't panic! I'm a busy college student and may forget a post if I'm extra busy (or it might just take me a while to be able to do a decent reply). If you still need help and are awaiting
my reply after a few days, PM me about it.
When posting what errors you get, please give the full message. It makes helping you much easier.