FID(0)

[Lawrence_Leavell]

Is there any problem with labeling the FID(0) with something *other* than a value beginning with a "T"?

[Mike King]

The system doesn't care or use the FiD value for anything other than as part of a temporary file name. 

It can be pretty much any combination of characters you want but should only consist of printable characters allowed in file names.