Well this is what I do and I have done this many many times. You must be very careful and notice the split between the ROM chip and its seating. Also note the extra holes. What I do after I have dropped the new pins over the holes is check with a bright light and magnifying glass. If you can take a digi and quickly look on a PC you can often see very high def pics of how the pins are sitting. Anyway, others use a special ROM lifter, I use a screwdriver but I am very careful and slow...
http://www.commodore-amiga-retro.com/amiga/amiga_scuzz102.htmSee what else I did with my £11 A1200...