i agree with conwyn. xtract it first, select what you want and add to the flash.
that way your flash is not filled with 100's of files you will not use.
BTW, is there an easy way to re tar the files YOU DO want to uplaod, so that you don't have to tftp them one at a time?
That command should work.
As Conwyn said you might want to check the size of your flash to make sure you have enough space for the extraction of the file.
When you run that command to you receive an error?
Do you have a connection with your tftp?
Can you ping your tftp?
Are you sure you have the tftp pointing to the correct directory where you have the file stored?
I would check the questions above and let us know. If you are receiving an error when you run the command, I would like to see the error. Might help shed some light on the issue.
You can try this command too.
archive download-sw tftp://x.x.x.x/cme-full-184.108.40.206.tar This command will download and extract the files.