Just tried printing in landscape mode and had no problems with the following setup:
1GHz Tibook, OS 10.2.4, FM Pro v6.0.0 (trial version included with Tibook), Epson 1280
First selected landscape from File>Page Setup menu. Then Cmd-P to print. Worked perfectly.
I normally use FM for some business needs on my G3 Pismo Powerbook. Just recently tried the trial version on my Tibook to see how compatible it is with OS X.
Roger