Lupo (6X): Total damage due to leaking servo line?, year 2002

Hello screwdriver, I just don’t want to believe what the (free) workshop announced to me: My Lupo is a total damage, because at an inaccessible point the pressure line of the (mechanical) power steering is rusted and leaked! Before I make myself (as a long time no longer used) to screw it, which method / manual can you recommend to me for the work? In the TEC publishing house you can order VW-substances (‘ suspension, axles, steering’ for approx. 25,-€, or enough a 1-hour Flat rate for 7,-€ at ‘erWin’ to find a good guide? Can you get the steering gear out of the rusted screws; it is too risky for me to screw on the inaccessible pressure cord nipples: they will stop anyway. Thanks for every tip