I managed to get my LT modem in my Toshiba laptop working by downloading the driver sources from a link on linmodems.org, installing the kernel-headers and running one of the scripts (I think it was called 'make_deb') in the driver distribution. They also include scripts like 'make_rpm' for other distros packaging systems. For more info please email me.
Just thought it might give you hope. I'm still quite the fresh faced newbie but my learning curve has been very steep of late.
Pete