MacType is a great alternative to Gdipp. Both do great jobs in rendering Windows font to be like MacOS X.
But if you had this error “Invalid image size” upon starting your MacType tray, it is due to your Taskbar and Active Title Bar size is smaller than certain size. Mine is smaller than 18.
In Windows 7, go to Control Panel –> Window Color and Appearance, click Advanced appearance settings. Select Active Title Bar and adjust it till you see no more error.
MacType should be now working fine.
