Only download a tool called mouse emulator. In the game menu when you choose the option click with the mouse and the keyboard than, with mouse emulator is the numberpad the "1" key; and you can select any option.
I try this method and is successfull
four years later but now is possible play heist in a actual computer, thansk to me .
I play under winxp, pentium IV, 1 GB RAM and 128 MB video.
And i have win7 but i don't try