Boot procedure for Magic III clone

[fratres]

I know, would be the best choice just to replace it, but I suppose it´s not just take it out, desolder the cables on the modchip-side and resolder them on the new chip but make new connections to different points on the MB. And that is something I really wouldn´t like to do by myself. As installing a modchip costs 50 Euro around here the whole thing is rather expensive. Or do you think replacing it wouldn´t be as difficult as putting a new one inside? Could get an used Infinity rather cheap, but they need different soldering points, don´t they? My clone Matrix has 22 cables, by the way.