I know of absolutely nno program or service that will transfer 100% of data from one program to another.
That said.. there is a way to lessen the cost.
1). Download the free 30 trial version of TMG 8 and use that to get your data from TMG 5 to TMG 8
2). Find someone (perhaps a volunteer from this board) who will transfer your TMG 8 data to FTM2012
3). Find someone (perhaps the same person) who would transfer that FTM2012 data to the latest Mac version of 2012.
Something else just occurred to me... you might find someone willing to do all this on the TMG users Mailing list. I know there are several people on that list run Macs.
One Community - One Standard!www.fhiso.org