I'm going to try to help but your question is not very clear. It sounds like you can boot from a external USB drive.
Put the installation disk in and boot holding the "C" key down. Go to Utilities - Disk Utility. See if this sees the new internal hard drive. Give the new drive one partition and format it GUID. Then try installing the system.
What is the model of the drive you are trying to install? Is it a SATA?
I'm going to try to help but your question is not very clear. It sounds like you can boot from a external USB drive.
Put the installation disk in and boot holding the "C" key down. Go to Utilities - Disk Utility. See if this sees the new internal hard drive. Give the new drive one partition and format it GUID. Then try installing the system.
What is the model of the drive you are trying to install? Is it a SATA?
I'm going to try to help but your question is not very clear. It sounds like you can boot from a external USB drive.
Put the installation disk in and boot holding the "C" key down. Go to Utilities - Disk Utility. See if this sees the new internal hard drive. Give the new drive one partition and format it GUID. Then try installing the system.
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What is the model of the drive you are trying to install? Is it a SATA?
I'm going to try to help but your question is not very clear. It sounds like you can boot from a external USB drive.
Put the installation disk in and boot holding the "C" key down. Go to Utilities - Disk Utility. See if this sees the new internal hard drive. Give the new drive one partition and format it GUID. Then try installing the system.