[galaxy-user] GenBank database files

This should be easy (but not for me so far). I want to do local blast searches, so I download the premade nr protein blast database from GenBank. It is split into 10 .tar.gz files. I've decompressed them all, and now I want to put all the file parts together. Can I simply concatenate all similar files? (e.g. all 10 parts of the .phd files). The Readme mentions use of an alias file, but I did not find this at all clear. A set of step-by-step decompression and restoration instructions would be useful. I could not find any. Thanks for any assistance, Mike DS Sent from my iPhone4