I forgot how to turn the parsec files into dat. and change appid 

I did change some files to dat by changing parsec to dat but when I try and use song creator tool I'm not able to see files to update appid. what am I forgetting or doing wrong I have alot of songs from smithyanvil and I recognize the sites where i got  songs before, but my memory is @($)$_!! so any help would be appreciated.

Psarcs are for Rocksmith 2014, dats are for Rocksmith 2012.

 

You can convert dats to psarcs by unpacking them with the toolkit, then basically rebuilding them using EOF to create the new xml files.

 

I'm not so sure you can do this the other way, since RS2014 has a lot of new notation features.

 

It might make more sense just to buy RS2014, especially since it's been on sale lately.

so are all these new songs for 2014 only? 

 

so are all these new songs for 2014 only? 

 

Yes.

Yes.

Please read the FAQ