Hello,

Just a quick question regarding the installation of a custom operating system:

About a month or two ago, I had installed COS5 in my 99 Trans Am. I had alot of trouble with it and gave up. I loaded my factory OS back up and have been running it since.

I have learned alot about tuning since then and I'm considering putting COS5 back in for the options it gives for nitrous tuning.

Finally the question- Can I load my old COS5 tune all together? Meaning, change the OS AND load the calibrations or do I have to load the OS THEN load my calibrations?

Thanks