How to install Crunchbang Linux on an old IBM laptop

Yes­ter­day I managed to buy a T42 laptop manu­factu­red by IBM in 2004. The com­pu­ter looks like new, no bru­i­ses or even cracks, nothing like that, the key­bo­ard and all the plas­tic parts untou­ched. Tou­ch­pad does not seem to have been used at all. The dis­play is per­fect­ly clear and cle­an. So I was sear­ching, and found a wor­ka­round…