[Motorola] GMRS question

[WØQFC]

I hope that someone on the reflector can help me with these questions:

I recently purchased a pair of Motorola FRS/GMRS radios and the so-called 
instructions leave a lot to be desired.
First, I understand that you do not have to be licensed for the FRS but do 
have to be licensed for the GMRS - true?
Second, how do you know which of the 22 channels are the radios are which?
Third, right after I got the radios I went to the FCC web site looking for 
info and thought that they were saying that I needed a license, so I applied 
(and got) the license (WQDN796).
Fourth, now that I got the license for GMRS can I use two older Aerotron 
radios with this license? Do the radios have to be "Type-Accepted?
I would really appreciate any help!
Thanks

73


Gene, WØQFC
Spring Hill, Florida
www.w0qfc.com