That would be quite the mod if possible.
I wouldn't think it is possible.
It would be even harder to retain the pen use.
To retain the pen use, you'd need a Dual Digitizer that does Touch and Pen like the TabletKiosk Sahara i440D Dual Mode Digi/Touch Screen Tablet.
Good Luck !
I googled TC1100 Touch Screen and didnt get much. Just people erroneously calling the Active Digitizer on the 1100 a "Touch Screen".
Motion LE1600 VA x2, Motion LS800, Toshiba M200 x4, Motion LE1700 x4 and a TC1100 with dock just for nostalgia. Motion C5 x1, No Ipads.