making file-system read/write on Leopard.

I had a Macbook pro that died. I need to get some files from the harddisk. The harddisk has been mounted on another Mac running leopard. Unfortunately the file-system is showing as read-only making the disk unusable for further writing on that mac.

How can I make the mounted drive read/write. I have tried to search on various forums and even ggogle it but not found a workable answer.

Thanks in advance.

 

Thanks for the quick reply. Well, I need the write permission to make teh hard disk usable on the new system.
I have tried the option of using UNIX like command chmod, but that does show the permissions as rw for the user.

Is there anything else I could do.